UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q


       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
                              EXCHANGE ACT OF 1934

                      For the quarter ended March 31, 1999

                         Commission File Number 1-11154

                      ------------------------------------

                      ULTRAMAR DIAMOND SHAMROCK CORPORATION

              Incorporated under the laws of the State of Delaware
                  I.R.S. Employer Identification No. 13-3663331

                            6000 North Loop 1604 West
                          San Antonio, Texas 78249-1112
                        Telephone number: (210) 592-2000

                     --------------------------------------

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                                  Yes X No ____


As of April 30, 1999,  86,587,000 shares of Common Stock,  $0.01 par value, were
outstanding  and the  aggregate  market value of such stock as of April 30, 1999
was $1,996,919,000.



                      ULTRAMAR DIAMOND SHAMROCK CORPORATION
                                    FORM 10-Q
                                 MARCH 31, 1999

                                TABLE OF CONTENTS
                                                                            Page

                         PART I - FINANCIAL INFORMATION

Item 1.  Financial Statements

     Consolidated Balance Sheets as of March 31, 1999 and
          December 31, 1998..................................................  3

      Consolidated Statements of Income for the Three Months 
          Ended March 31, 1999 and 1998......................................  4

      Consolidated Statements of Cash Flows for the Three Months 
          Ended March 31, 1999 and 1998......................................  5

      Consolidated Statements of Comprehensive Income for the 
          Three Months Ended March 31, 1999 and 1998.........................  6

      Notes to Consolidated Financial Statements.............................  7

Item 2.  Management's Discussion and Analysis of Financial Condition 
          and Results of Operations.......................................... 11

Item 3.  Quantitative and Qualitative Disclosures About Market Risk.......... 19

                           PART II - OTHER INFORMATION

Item 1.  Legal Proceedings................................................... 22

Item 4.  Submission of Matters to a Vote of Security Holders................. 22

Item 6.  Exhibits and Reports on Form 8-K.................................... 22

               SIGNATURE..................................................... 23



PART I - FINANCIAL INFORMATION

Item 1.  Consolidated Financial Statements


                      ULTRAMAR DIAMOND SHAMROCK CORPORATION
                           CONSOLIDATED BALANCE SHEETS
                        (in millions, except share data)
                                                                           March 31,       December 31,
                                                                             1999              1998
                                                                             ----              ----
                                                                          (Unaudited)

                                                                                      
                                Assets
Current assets:
   Cash and cash equivalents........................................       $   108.4        $   176.1
   Accounts and notes receivable, net...............................           307.0            562.7
   Inventories......................................................           581.8            635.6
   Prepaid expenses and other current assets........................            30.4             33.0
   Deferred income taxes............................................            98.4             98.4
                                                                           ---------        ---------
      Total current assets..........................................         1,126.0          1,505.8
                                                                           ---------        ---------

Property, plant and equipment.......................................         4,463.7          4,423.2
Less accumulated depreciation and amortization......................        (1,208.4)        (1,162.0)
                                                                           ---------        ---------
   Property, plant and equipment, net...............................         3,255.3          3,261.2
Other assets, net...................................................           582.1            548.0
                                                                           ---------        ---------
    Total assets....................................................       $ 4,963.4        $ 5,315.0
                                                                           =========        =========

                 Liabilities and Stockholders' Equity
Current liabilities:
   Notes payable and current portion of long-term debt..............       $     4.8        $     5.8
   Accounts payable.................................................           301.7            366.0
   Accrued liabilities..............................................           343.2            402.4
   Taxes other than income taxes....................................           289.7            343.0
   Income taxes payable.............................................            24.4             28.9
                                                                           ---------        ---------
      Total current liabilities.....................................           963.8          1,146.1
                                                                           ---------        ---------

Long-term debt, less current portion................................         1,762.2          1,926.2
Other long-term liabilities.........................................           443.3            453.7
Deferred income taxes...............................................           212.0            205.0
Commitments and contingencies

Company obligated preferred stock of subsidiary.....................           200.0            200.0

Stockholders' equity:
   Common Stock, par value $0.01 per share:
     250,000,000 shares authorized, 86,556,000 and
     86,558,000 shares issued and outstanding as of
     March 31, 1999  and December 31, 1998..........................             0.9              0.9
   Additional paid-in capital.......................................         1,513.1          1,512.7
   Treasury stock...................................................          (100.6)          (100.1)
   Retained earnings................................................            74.6             82.5
   Accumulated other comprehensive loss ............................          (105.9)          (112.0)
                                                                           ---------        ---------
     Total stockholders' equity.....................................         1,382.1          1,384.0
                                                                           ---------        ---------
     Total liabilities and stockholders' equity.....................       $ 4,963.4        $ 5,315.0
                                                                           =========        =========

          See accompanying notes to consolidated financial statements.




                      ULTRAMAR DIAMOND SHAMROCK CORPORATION
                        CONSOLIDATED STATEMENTS OF INCOME
            (Unaudited, in millions, except share and per share data)

                                                                          Three Months Ended March 31,
                                                                          ----------------------------
                                                                             1999               1998
                                                                             ----               ----
                                                                                         
    Sales and other revenues (including excise taxes)..............       $2,725.7             $2,789.6
                                                                          --------             --------

    Operating costs and expenses:
       Cost of products sold.......................................        1,547.2              1,621.3
       Operating expenses..........................................          255.7                287.9
       Selling, general and administrative expenses................           87.4                 78.6
       Taxes other than income taxes...............................          712.8                678.3
       Depreciation and amortization...............................           57.1                 65.4
                                                                          --------             --------
          Total operating costs and expenses.......................        2,660.2              2,731.5
                                                                          --------             --------

    Operating income...............................................           65.5                 58.1
      Interest income..............................................            2.9                  2.1
      Interest expense.............................................          (38.6)               (36.1)
      Equity income from Diamond-Koch..............................            1.5                   -
      Gain on sale of property, plant and equipment................              -                 7.0
                                                                          --------             --------

    Income before income taxes and dividends of
      subsidiary...................................................           31.3                 31.1
      Provision for income taxes...................................           12.7                 12.1
      Dividends on preferred stock of subsidiary...................            2.6                  2.6
                                                                          --------             --------
    Net income.....................................................       $   16.0             $   16.4
                                                                          ========             ========

    Net income per share:
       Basic.......................................................          $0.18               $0.18
       Diluted.....................................................          $0.18               $0.18

    Weighted average number of shares (in thousands):
       Basic.......................................................         86,557             87,284
       Diluted.....................................................         86,643             90,882

    Dividends per share:
       Common Shares...............................................         $0.275             $0.275
       5% Cumulative Convertible Preferred Shares..................           -                $0.625

          See accompanying notes to consolidated financial statements.




                      ULTRAMAR DIAMOND SHAMROCK CORPORATION
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                            (Unaudited, in millions)

                                                                        Three Months Ended March 31,
                                                                        ----------------------------
                                                                          1999                1998
                                                                          ----                ----
                                                                                     
Cash Flows from Operating Activities:
Net income......................................................          $  16.0          $   16.4
Adjustments to reconcile net income to
  net cash provided by operating activities:
   Depreciation and amortization................................             57.1              65.4
   Provision for losses on receivables..........................              1.7               4.9
   Equity income from Diamond-Koch..............................             (1.5)              -
   Loss (gain) on sale of property, plant and equipment.........              0.1              (7.5)
   Deferred income tax provision................................              6.0               2.9
   Other, net...................................................              0.5              (4.2)
   Changes in operating assets and liabilities:
     Decrease in accounts and notes receivable..................            249.3             154.6
     Decrease in inventories....................................             56.8              97.1
     Decrease in prepaid expenses and other current assets......              2.7              13.2
     Increase in other assets...................................             (8.8)             (7.7)
     Decrease in accounts payable and other current liabilities.           (195.4)           (324.6)
     Decrease in other long-term liabilities....................            (13.0)              5.9
                                                                          -------          --------
       Net cash provided by operating activities................            171.5              16.4
                                                                          -------          --------

Cash Flows from Investing Activities:
 Capital expenditures...........................................            (35.3)            (28.8)
 Deferred refinery maintenance turnaround costs.................            (18.3)             (7.5)
 Proceeds from sales of property, plant and equipment...........              2.2              27.8
                                                                          -------          --------
   Net cash used in investing activities........................            (51.4)             (8.5)
                                                                          -------          --------

Cash Flows from Financing Activities:
 Net change in commercial paper and short-term borrowings.......           (162.6)             25.6
 Repayment of long-term debt....................................             (2.7)             (2.2)
 Payment of cash dividends......................................            (23.8)            (24.9)
 Other, net.....................................................              0.1               4.5
                                                                          -------          --------
   Net cash provided by (used in) financing activities..........           (189.0)              3.0
                                                                          -------          --------

Effect of exchange rate changes on cash.........................              1.2               0.1
                                                                          -------          --------

Net Increase (Decrease) in Cash and Cash Equivalents............            (67.7)             11.0
Cash and Cash Equivalents at Beginning of Period................            176.1              92.0
                                                                          -------          --------

Cash and Cash Equivalents at End of Period......................          $ 108.4          $  103.0
                                                                          =======          ========

          See accompanying notes to consolidated financial statements.




                      ULTRAMAR DIAMOND SHAMROCK CORPORATION
                 CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
                            (Unaudited, in millions)

                                                                        Three Months Ended March 31,
                                                                        ----------------------------
                                                                          1999                1998
                                                                          ----                ----
                                                                                        
Net income......................................................          $16.0               $16.4

Other comprehensive income (loss):
   Foreign currency translation adjustment......................            7.2                 3.7
   Minimum pension liability adjustment, net of income taxes....           (1.1)                  -
                                                                          -----               -----

Comprehensive income............................................          $22.1               $20.1
                                                                          =====               =====

          See accompanying notes to consolidated financial statements.




                      ULTRAMAR DIAMOND SHAMROCK CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                 March 31, 1999
                                   (Unaudited)

NOTE 1:  Basis of Presentation

The accompanying  unaudited consolidated financial statements have been prepared
by Ultramar  Diamond  Shamrock  Corporation  (the Company),  in accordance  with
generally  accepted  accounting  principles for interim financial  reporting and
with Securities and Exchange  Commission rules and regulations for Form 10-Q. In
the opinion of  management,  all  adjustments  (consisting  of normal  recurring
accruals) considered necessary for a fair presentation have been included. These
unaudited  consolidated  financial statements should be read in conjunction with
the audited consolidated  financial statements and notes thereto included in the
Company's annual report on Form 10-K for the year ended December 31, 1998.

Operating  results for the three months ended March 31, 1999 are not necessarily
indicative of the results that may be expected for the year ending  December 31,
1999. The results of operations may be affected by seasonal factors, such as the
demand for petroleum products and working capital  requirements in the Northeast
System,  which vary significantly  during the year; or industry factors that may
be specific to a particular  period,  such as movements in and the general level
of crude oil  prices,  the demand for and prices of refined  products,  industry
supply capacity and maintenance turnarounds.

Certain  previously  reported  amounts have been  reclassified to conform to the
1999 presentation.

NOTE 2:  Inventories

Inventories consisted of the following:


                                                                             March 31,        December 31,
                                                                               1999               1998
                                                                               ----               ----
                                                                                    (in millions)
                                                                                          
      Crude oil and other feedstocks..........................................$189.5            $283.9
      Refined and other finished products and convenience store items..........336.0             296.9
      Materials and supplies................................................... 56.3              54.8
                                                                               -----            ------
           Total inventories..................................................$581.8            $635.6
                                                                               =====             =====




NOTE 3:  Computation of Net Income Per Share

Basic net income per share is  calculated  as net income  less  preferred  stock
dividends  divided by the weighted average number of Common Shares  outstanding.
Diluted  net  income  per share  assumes,  when  dilutive,  issuance  of the net
incremental  shares from stock options and restricted  stock,  and, in 1998, the
conversion  of the 5% Cumulative  Convertible  Preferred  Shares.  The following
table  reconciles  the  net  income  amounts  and  share  numbers  used  in  the
computation of net income per share (in millions, except per share data).



                                                                        Three Months Ended March 31,
                                                                        ----------------------------
                                                                          1999                1998
                                                                          ----                ----
                                                                                       
Basic Net Income Per Share:
Weighted average number of Common Shares outstanding
    (in thousands)...............................................         86,557             87,284
                                                                          ======             ======

Net income.......................................................         $ 16.0             $ 16.4
Dividends on 5% Cumulative Convertible Preferred
     Stock.......................................................              -                1.1
                                                                          ------             ------
Net income applicable to Common Shares...........................         $ 16.0             $ 15.3
                                                                          ======             ======

Basic net income per share.......................................         $ 0.18             $ 0.18
                                                                          ======             ======

Diluted Net Income Per Share:
Weighted average number of Common Shares outstanding
    (in thousands)...............................................         86,557             87,284

Net effect of dilutive stock options based on the treasury stock
method using the average market price............................             86                804

Assumed conversion of 5% Cumulative Convertible Preferred
  Shares (prior to conversion in March 1998).....................              -              2,794
                                                                          ------             ------

Weighted average common equivalent shares........................         86,643             90,882
                                                                          ======             ======

Net income.......................................................         $ 16.0             $ 16.4
                                                                          ======             ======

Diluted net income per share.....................................         $ 0.18             $ 0.18
                                                                          ======             ======


NOTE 4:  Restructuring and Other Charges

In June 1998, the Company adopted a three-year  restructuring plan to reduce its
retail  cost  structure  by  eliminating  341  positions  to  improve  operating
efficiencies and to close and sell 316  under-performing  convenience stores. In
addition,  the Company restructured certain pipeline and terminal operations and
support  infrastructure  resulting in the  elimination of 125  positions.  As of
March 31, 1999, 88 convenience stores were sold or closed and 276 employees were
terminated under the retail and pipeline and terminal restructuring plans.

In December 1998, the Company  finalized  plans to eliminate  approximately  300
non-essential  jobs,  programs and expenses  and to  implement  new  initiatives
designed to further reduce capital  employed and improve  earnings.  As of March
31, 1999, 95 employees were terminated under the profit improvement program.


Changes in accrued restructuring costs for the quarter ended March 31, 1999 were
as follows:



                                            Balance at                                              Balance at
                                         December 31, 1998        Payments      Reductions        March 31, 1999
                                         -----------------        --------      ----------        --------------
                                                                                           
Severance and related costs                    $19.0                 $6.8           $0.3               $11.9
Lease buyout costs                              14.0                  0.1            0.8                13.1
Fuel system removal costs                       16.1                  0.9            2.8                12.4
                                               -----                 ----           ----               -----
                                               $49.1                 $7.8           $3.9               $37.4
                                               =====                 ====           ====               =====


NOTE 5:  Commitments and Contingencies

The  Company's  operations  are subject to  environmental  laws and  regulations
adopted by various governmental authorities.  Site restoration and environmental
remediation  and  clean-up  obligations  are  accrued  either when known or when
considered probable and reasonably  estimable.  Total future environmental costs
are  difficult  to  assess  and  estimate  due to  unknown  factors  such as the
magnitude of possible contamination,  the timing and extent of remediation,  the
determination  of the  Company's  liability  in  proportion  to  other  parties,
improvements in cleanup  technologies and the extent to which environmental laws
and regulations may change in the future.  Although environmental costs may have
a significant  impact on results of operations  for any single year, the Company
believes  that  such  costs  will  not have a  material  adverse  effect  on the
Company's financial position.

There are various legal  proceedings and claims pending against the Company that
arise in the ordinary course of business. It is management's opinion, based upon
advice of legal counsel,  that these matters,  individually or in the aggregate,
will not have a material adverse effect on the Company's  financial  position or
results of operations.

NOTE 6:  Accounts Receivable Securitization

In March  1999,  the  Company  arranged  a  $250.0  million  revolving  accounts
receivable  securitization  facility.  On an ongoing  basis,  the Company  sells
certain   accounts   receivable   to  Coyote   Funding,   L.L.C.   (Coyote),   a
non-consolidated,   wholly-owned  subsidiary,  which  then  sells  a  percentage
ownership in such receivables,  without  recourse,  to a third party cooperative
corporation.  The  gross  proceeds  resulting  from the  sale of the  percentage
ownership  interest in the  receivables  totaled  $222.0 million as of March 31,
1999. The Company's  retained interest in receivables sold to Coyote is included
in accounts and notes receivable,  net in the accompanying  consolidated balance
sheet.  Discounts  and net  expenses  associated  with the  sale of  receivables
totaled $1.3 million and are  included in interest  expense in the  consolidated
statement of income for the three months ended March 31, 1999.

NOTE 7:  Business Segments

The   Company   has   three   reportable   segments:    Refining,   Retail   and
Petrochemical/NGL.  The Refining segment includes refinery,  wholesale,  product
supply and  distribution,  and  transportation  operations.  The Retail  segment
includes  Company-operated  convenience  stores,  dealers/jobbers  and truckstop
facilities,  cardlock and home  heating oil  operations.  The  Petrochemical/NGL
segment  includes  the equity  earnings  from  Diamond-Koch  and  earnings  from
Nitromite  fertilizer,  NGL  marketing  and  certain  NGL  pipeline  operations.
Diamond-Koch  is a 50-50 joint  venture  primarily  related to the Mont  Belvieu
petrochemical assets of the Company and Koch Industries, Inc.



The  Company's  reportable  segments  are  strategic  business  units that offer
different  products and services.  They are managed  separately as each business
requires  unique  technology  and marketing  strategies.  The Company  evaluates
performance  based on  earnings  before  interest,  taxes and  depreciation  and
amortization   (EBITDA).   Intersegment   sales  are   generally   derived  from
transactions made at prevailing market rates.



                                                                       Petrochemical/
                                            Refining      Retail            NGL           Corporate        Total
                                            --------      ------            ---           ---------        -----
                                                                       (in millions)
                                                                                            
Three months ended March 31, 1999:
   Sales and other revenues from
      external customers...............      $1,435.2     $1,266.0          $ 24.5          $  -           $2,725.7
   Intersegment sales..................         488.2          2.1             -               -              490.3
   EBITDA..............................         110.3         52.9             1.0           (41.6)           122.6
   Depreciation and amortization.......          39.8         16.2             0.3             0.8             57.1
   Operating income (loss).............          70.5         36.7             0.7           (42.4)            65.5
   Total assets........................       3,458.2      1,265.7           167.6            71.9          4,963.4

Three months ended March 31, 1998:
   Sales and other revenues from
      external customers...............       1,280.0      1,428.3            81.3             -            2,789.6
   Intersegment sales..................         521.1          1.0             6.1             -              528.2
   EBITDA..............................          70.1         67.3            15.5           (29.4)           123.5
   Depreciation and amortization.......          37.7         23.1             2.4             2.2             65.4
   Operating income (loss).............          32.4         44.2            13.1           (31.6)            58.1
   Total assets........................       3,199.6      1,314.3           224.1           563.6          5,301.6


The following  summarizes the  reconciliation  of reportable  segment  operating
income to  consolidated  operating  income for the three  months ended March 31,
1999 and 1998 (in millions):

                                                            1999       1998
                                                            ----       ----
Operating income:
  Total operating income for reportable segments...        $107.9     $ 89.7
  Other income (loss)..............................         (42.4)     (31.6)
                                                            -----      -----
     Consolidated operating income.................        $ 65.5     $ 58.1
                                                            =====       ====

NOTE 8:  Diamond 66

On March 19,  1999,  the  Company  and  Phillips  Petroleum  Company  terminated
discussions  related to the formation of a proposed  joint venture  (Diamond 66)
between  the two  companies.  During  the first  quarter  of 1999,  the  Company
expensed $11.0 million of transaction costs incurred related to the formation of
Diamond 66,  which costs are  included  in selling,  general and  administrative
expenses.

NOTE 9:  Proposed Sale of the Michigan System

In December  1998,  the  Company  announced  plans to  consider  the sale of the
Michigan  operations,  which  consist of the Alma  Refinery,  product  and crude
pipelines,  four terminals and 183 convenience  stores. The Company has received
and is currently reviewing several proposals from interested  parties;  however,
no  agreements  or final  decision has been made  relating to a possible sale of
such assets.

NOTE 10:  Subsequent Events

On May 4, 1999, the Board of Directors  declared a quarterly  dividend of $0.275
per Common Share payable on June 3, 1999 to holders of record on May 20, 1999.



Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations

The Company

Ultramar  Diamond Shamrock  Corporation  (the Company) is a leading  independent
refiner and retailer of  high-quality  refined  products and  convenience  store
merchandise  in the central and  southwest  regions of the United States (the US
System),  and the  northeast  United  States and eastern  Canada (the  Northeast
System).  Its operations  consist of seven  refineries,  over 5,900  convenience
stores,  pipelines,  a home  heating oil  business,  and  related  petrochemical
operations.

The  Company's  operating  results  are  affected by  Company-specific  factors,
primarily its refinery utilization rates and maintenance  turnarounds;  seasonal
factors,  such  as  the  demand  for  petroleum  products  and  working  capital
requirements;  and industry factors, such as movements in and the level of crude
oil prices,  the demand for and prices of refined  products and industry  supply
capacity.  The  effect of crude oil price  changes  on the  Company's  operating
results is  determined,  in part,  by the rate at which refined  product  prices
adjust to reflect such changes.  As a result,  the Company's  earnings have been
volatile in the past and may be volatile in the future.

On  March  19,  1999 the  Company  and  Phillips  Petroleum  Company  (Phillips)
terminated  discussions  related to the  formation of a proposed  joint  venture
(Diamond 66) between the two  companies.  During the first quarter of 1999,  the
Company  expensed  $11.0 million of transaction  costs  incurred  related to the
formation of Diamond 66.

Seasonality

In the Northeast  System,  demand for petroleum  products  varies  significantly
during the year.  Distillate  demand  during the first and fourth  quarters  can
range  from 30% to 40% above the  average  demand  during  the  second and third
quarters.  The  substantial  increase in demand for home  heating oil during the
winter months  results in the Company's  Northeast  System having  significantly
higher  accounts  receivable  and  inventory  levels during the first and fourth
quarters  of each year.  The  Company's  US System is less  affected by seasonal
fluctuations in demand than its operations in the Northeast System.  The working
capital  requirements  of  the  US  System,  though  substantial,   show  little
fluctuation  throughout the year. Both the US and Northeast Systems are impacted
by the increased demand for gasoline during the summer driving season.



Results of Operations

Three Months Ended March 31, 1999 Compared to Three Months Ended March 31, 1998

Financial and operating data by geographic area for the three months ended March
31, 1999 and 1998 are as follows:

Financial Data:


                                                                  Three Months Ended March 31,
                                            --------------------------------------------------------------------------
                                                          1999                                    1998
                                            ----------------------------------      ----------------------------------
                                                US     Northeast       Total            US     Northeast       Total
                                                --     ---------       -----            --     ---------       -----
                                                                          (in millions)
                                                                                            
Sales and other revenues...............     $2,146.6       $579.1     $2,725.7      $2,132.8       $656.8     $2,789.6
Cost of products sold (1)..............      1,241.8        305.4      1,547.2       1,256.0        365.3      1,621.3
Operating expenses.....................        227.5         28.2        255.7         257.0         30.9        287.9
Selling, general and
  administrative expenses (2)..........         48.0         39.4         87.4          38.3         40.3         78.6
Taxes other than income taxes..........        543.4        169.4        712.8         499.8        178.5        678.3
Depreciation and amortization..........         47.9          9.2         57.1          56.5          8.9         65.4
                                             -------        -----      -------       -------        -----      -------
Operating income.......................     $   38.0       $ 27.5         65.5      $   25.2       $ 32.9         58.1
                                             =======        =====                    =======        =====
Interest income........................                                    2.9                                     2.1
Interest expense.......................                                  (38.6)                                  (36.1)
Equity income from Diamond-Koch (3)....                                    1.5                                     -
Gain on sale of assets (4).............                                      -                                   7.0
                                                                       ---------                               -------
Income before income taxes and
  dividends of subsidiary..............                                   31.3                                    31.1
Provision for income                                                      12.7                                    12.1
taxes.............
Dividends on subsidiary stock..........                                    2.6                                     2.6
                                                                       ---------                               -------
Net income.............................                               $   16.0                                $   16.4
                                                                       =========                               =======

(1) In March 1998, the Company  recorded a $13.6 million  non-cash  reduction in
the carrying value of inventories  due to the  significant  market drop in crude
oil and refined product prices during the first quarter of 1998.

(2) In March 1999,  the Company  expensed  $11.0  million of  transaction  costs
associated with the termination of the proposed Diamond 66 joint venture.

(3) In September  1998,  the Company  contributed  certain of its  petrochemical
assets to the Diamond-Koch joint venture, which is being accounted for using the
equity accounting method.  Operating income in the first quarter of 1998 for the
petrochemical assets contributed was $4.9 million, excluding overhead.

(4) In March 1998,  the Company  recognized a $7.0 million gain on the sale of a
25% interest in a pipeline and terminal facility.



Operating Data:
- --------------
                                                   Three Months Ended March 31,
                                                   ----------------------------
                                                       1999         1998
                                                       ----         ----
US System

   Mid-Continent Refineries (1)
        Throughput (bpd)............................. 390,600      402,300
        Margin (dollars per barrel) (2)..............  $ 3.27       $ 3.10
        Operating cost (dollars per barrel)..........  $ 1.87       $ 2.02

   Wilmington Refinery
        Throughput (bpd)............................. 131,800      124,000
        Margin (dollars per barrel)..................  $ 5.53       $ 4.82
        Operating cost (dollars per barrel)..........  $ 1.70       $ 2.28

   Retail
        Fuel volume (bpd)............................ 170,900      167,300
        Fuel margin (cents per gallon)...............    10.9         13.9
        Merchandise sales ($1,000/day)............... $ 3,188      $ 2,927
        Merchandise margin (%).......................   26.1%        30.7%

Northeast System

   Quebec Refinery
        Throughput (bpd)............................. 158,200      156,500
        Margin (dollars per barrel)(2)...............  $ 1.68       $ 2.23
        Operating cost (dollars per barrel)..........  $ 0.86       $ 1.03

   Retail
        Fuel volume (bpd)............................  73,500       70,100
        Overall margins (cents per gallon) (3).......    25.8         29.1

(1) The Mid-Continent  Refineries include the Alma, Ardmore,  Denver,  McKee and
Three Rivers Refineries.

(2) Refinery  margins for 1998 exclude the impact of the non-cash charge for the
reduction in the carrying value of crude oil and refined product inventories due
to the drop in crude oil and refined product prices. Had the non-cash charge for
the reduction of inventories been included in the refinery margin  computations,
the 1998 refinery margins would have been $2.91 per barrel for the Mid-Continent
Refineries and $1.75 per barrel for the Quebec Refinery.

(3) Retail marketing overall margin reported for the Northeast System represents
a blend of gross  margin for  Company  and  dealer-operated  retail  outlets and
convenience stores, home heating oil sales and cardlock operations.



General

Net income  for the  quarter  ended  March 31,  1999  totaled  $16.0  million as
compared  to $16.4  million  for the quarter  ended  March 31,  1998.  The first
quarter of 1999  included a $6.6  million  after-tax  charge to record  expenses
associated  with the termination of the proposed  Diamond 66 joint venture.  The
first  quarter of 1998 included a $4.3 million  after-tax  gain on the sale of a
25% interest in a pipeline and terminal  facility and an $8.3 million  after-tax
non-cash  charge to reduce  inventories  due to the continuing drop in crude oil
and refined product prices. Excluding these unusual items, net income would have
been $22.6  million in 1999 as compared to $20.4 million in 1998. On a per share
basis, basic and diluted net income per share for both the first quarter of 1999
and 1998 was $0.18 per share.

US System

The US System had  operating  income of $38.0  million for the first  quarter of
1999, as compared to $25.2  million for the first quarter of 1998.  The increase
in operating  income was  primarily due to improved  refinery  margins and lower
operating expenses.

Overall, US refining  operations improved  significantly over 1998 levels due to
higher refinery margins and lower operating  costs. The lower industry  refining
margins  resulting from high  inventories  and declining crude oil prices in the
early part of the first quarter of 1999  negatively  impacted the  Mid-Continent
Refineries' margin.  However,  the Mid-Continent  Refineries benefited $1.15 per
barrel from the positive  effect of buying their crude oil 40 days in advance in
the  latter  part of the  quarter  when crude oil  prices  began to rise,  which
resulted in a $3.27 per barrel refinery margin for the first quarter of 1999. In
addition, the operating costs were lower in 1999 by $0.15 per barrel as compared
to 1998 due to lower utility and maintenance expenses.  The decrease in refining
throughput for the  Mid-Continent  Refineries,  from 402,300  barrels per day in
1998 to 390,600  barrels per day in 1999, was due to planned  production cuts in
January and February  1999  implemented  to counter the effect of weak  industry
margins.

The Wilmington  Refinery  margin improved 14.7% from $4.82 per barrel in 1998 to
$5.53 per barrel 1999 as the Company  benefited from the supply imbalance in the
California market, which was caused by unplanned shutdowns at several West Coast
refineries. In addition, throughput at the Wilmington Refinery increased 6.3% to
131,800  barrels  per  day due to the  debottlenecking  of the  fluid  catalytic
cracking unit (FCCU) in December 1998.

The US retail  operations  were  negatively  impacted  by the sharp  increase in
wholesale  gasoline prices,  which increased faster than the retail pump prices.
The retail fuel margin declined from 13.9 cents per gallon in 1998 to 10.9 cents
per gallon in 1999. However,  the Company realized a 2.2% increase in the retail
fuel  volume in 1999 as compared to 1998 due to an  aggressive  pricing  program
initiated to increase per store volumes.  Partially offsetting the negative 1999
fuel  margin was the 8.9%  growth in  merchandise  sales in 1999 as  compared to
1998.  The  merchandise  margin,  however,  declined to 26.1% in 1999 due to the
increase in cigarette prices, which could not be fully passed on to customers.

Selling,  general and administrative expenses for the first quarter of 1999 were
$9.7 million  higher than in the first  quarter of 1998 due to the $11.0 million
of transaction  costs associated with the termination of the proposed Diamond 66
joint venture.

Northeast System

Sales and other revenues in the Northeast  System  decreased  $77.7 million from
$656.8  million  in the first  quarter  of 1998 to $579.1  million  in the first
quarter  of 1999.  The  decline in sales was due to  reduced  selling  prices of
refined products as a result of lower crude oil prices compared to 1998.

Throughput  for the first quarter of 1999  increased  1,700 barrels per day over
the first quarter of 1998.  The lower  throughput  for the first quarter of 1998
was  attributed  to the  shutdown of the crude unit for  repairs.  The  refinery
margin  decreased $0.55 per barrel from $2.23 per barrel in the first quarter of



1998 to $1.68 per barrel in the first  quarter of 1999  reflecting  high product
inventories  and the resulting  reduced  refinery  margins in the Atlantic Basin
since the beginning of 1999.  Partially  offsetting the reduced  refinery margin
were lower operating costs which declined to $0.86 per barrel in 1999 from $1.03
per barrel in 1998 due to lower supply and distribution  expenses related to the
wholesale operations.

Retail  operations  benefited  from a 4.9% increase in fuel volumes  despite the
warm  temperatures in the Northeast which reduced home heating oil volumes.  The
overall retail margin declined to 25.8 cents per gallon in 1999 as the increased
sales were generated from the motorist and cardlock businesses, which have lower
margins as compared to the home heating oil business.

Selling,  general and administrative expenses for the first quarter of 1999 were
comparable  to the  first  quarter  of 1998 due to lower  haulage  and  delivery
expenses in the home heating oil business, which were partially offset by higher
administrative   expenses  associated  with  severance  costs  for  a  departing
executive.

Corporate

Interest  expense of $38.6 million in the first quarter of 1999 was $2.5 million
higher  than  in  the  corresponding  quarter  of  1998  due to  higher  average
borrowings in 1999 as compared to 1998.

The  consolidated  income tax  provisions for the first quarter of 1999 and 1998
were based upon the Company's estimated effective income tax rates for the years
ending  December  31,  1999 and  1998 of  40.0%  and  39.0%,  respectively.  The
consolidated effective income tax rates exceed the U.S. Federal statutory income
tax rate primarily due to state income taxes, the effects of foreign  operations
and the amortization of nondeductible goodwill.

Outlook

The  Company's  earnings  depend  largely on refining  and retail  margins.  The
petroleum  refining and marketing industry has been and continues to be volatile
and highly  competitive.  The cost of crude oil purchased by the Company as well
as the price of refined  products sold by the Company have fluctuated  widely in
the past. As a result of the historic  volatility of refining and retail margins
and the  fact  that  they  are  affected  by  numerous  diverse  factors,  it is
impossible to predict future margin levels.

Industry  refining  margins  during  the  first  quarter  of 1999  continued  in
record-low territory until mid-February when margins finally bottomed-out.  With
margins  approaching  zero, or in the case of the Chicago market  dropping below
zero, and with storage for refined  products  filled to capacity,  some refiners
made  significant  production cuts and margins  started to improve.  At the same
time, several West Coast refineries reduced run rates as a result of a series of
mishaps and unplanned  outages.  With margins already turning around  throughout
the United States,  the disruption in the tightly balanced West Coast market had
a ripple  effect  throughout  the country and the  quarter  ended with  improved
refining margins.

As the second quarter of 1999 begins,  crude oil prices have risen as OPEC seems
to be making good on their promise to cut crude oil output. The immediate effect
has been a reduction  in refining  margins as the run-up in crude oil prices has
outpaced  increases in wholesale  gasoline  prices.  At the same time,  the deep
discounts  for  crude  oil  purchased  in the  prompt  month  that  led to  full
utilization of refining  capacity  throughout  1998 and into early 1999 have now
been replaced with the more normal premium for prompt month barrels. The premium
to  purchase  current  barrels  acts as a  disincentive  for  refiners to refine
barrels in excess of current  requirements  because  next  month's  barrels  are
available at a discount from today's prices. As a consequence, utilization rates
should  retreat  from last  year's  record  highs,  and with  demand for refined
products  still robust,  inventory  levels should  decline.  As crude oil prices
stabilize and refined product inventories  decline,  refining and retail margins
should improve.

See "Certain Forward-Looking Statements."



Capital Expenditures

The petroleum refining and marketing  industry is a capital intensive  business.
Significant  capital  requirements  include  expenditures  to upgrade or enhance
refinery operations to meet environmental regulations and maintain the Company's
competitive  position,  as well as to acquire,  build and  maintain  broad-based
retail networks.  The capital  requirements of the Company's  operations consist
primarily of:

  - maintenance  expenditures,  such  as  those  required  to maintain equipment
    reliability and safety and to address environmental regulations; and

  - growth opportunity expenditures, such as those planned to expand and upgrade
    its retail business, to increase the capacity of certain refinery processing
    units  and  pipelines  and to construct  additional petrochemical processing
    units.

During the quarter  ended March 31, 1999,  capital  expenditures  totaled  $35.3
million of which $17.2 million  related to  maintenance  expenditures  and $18.1
million related to growth opportunity expenditures.  Approximately $12.4 million
and $4.2 million of costs have been incurred at the refineries and at the retail
level,  respectively,  for various maintenance expenditures.  During the quarter
ended  March 31,  1999,  the Company  also  incurred  $18.3  million in refinery
maintenance turnaround costs primarily at the Wilmington Refinery.

Growth opportunity expenditures for the quarter ended March 31, 1999 included:

  - $9.5 million associated with the implementation of the Company's new infor-
    mation technology system, and

  - $5.5 million to revamp the McKee Refinery's FCCU power train.

The  Company  is  continually  investigating  strategic  acquisitions  and other
business opportunities,  some of which may be material, that will complement its
current business activities.

The  Company  expects to fund its  capital  expenditures  from cash  provided by
operations and, to the extent  necessary,  from the proceeds of borrowings under
its bank credit  facilities and its commercial paper program discussed below. In
addition,  depending  upon its  future  needs and the cost and  availability  of
various  financing  alternatives,  the  Company  may,  from  time to time,  seek
additional debt or equity financing in the public or private markets.

Liquidity and Capital Resources

As of March  31,  1999,  the  Company  had cash and cash  equivalents  of $108.4
million.  The Company  currently has two committed,  unsecured  bank  facilities
which  provide a maximum of $700.0  million  U.S.  and $200.0  million  Cdn.  of
available credit, and a $700.0 million commercial paper program supported by the
committed, unsecured U.S. bank facility.

As of March 31, 1999, the Company had borrowing capacity of approximately $614.4
million  remaining  under its committed bank  facilities  and  commercial  paper
program  and had  approximately  $610.9  million  under  uncommitted,  unsecured
short-term lines of credit with various financial institutions.

In  addition  to its bank  credit  facilities,  the  Company  has  $1.0  billion
available  under  universal  shelf  registrations   previously  filed  with  the
Securities  and Exchange  Commission.  The net proceeds  from any debt or equity
offering  under the  universal  shelf  registrations  would add to the Company's
working capital and would be available for general corporate purposes.

The  Company  also has $69.1  million  available  pursuant  to  committed  lease
facilities  aggregating $355.0 million under which the lessors will construct or
acquire and lease to the Company primarily convenience stores.

The bank  facilities  and other debt  agreements,  as amended,  require that the
Company maintain certain financial ratios and other restrictive  covenants.  The
Company is in compliance  with such  covenants and believes that such  covenants



will not have a significant impact on the Company's  liquidity or its ability to
pay  dividends.  The  Company  believes  its  current  sources  of funds will be
sufficient to satisfy its capital expenditure, working capital, debt service and
dividend requirements for at least the next twelve months.

Effective  March  29,  1999,  the  Company   established  a  revolving  accounts
receivable  securitization facility (Securitization Facility) which provides the
Company with the ability to sell up to $250.0 million of accounts  receivable on
an ongoing basis. In connection with the  Securitization  Facility,  the Company
sells, on a revolving  basis, an undivided  interest in certain of its trade and
credit card  receivables.  The  proceeds  from the sale of accounts  receivable,
which  totaled  $222.0  million  at March 31,  1999,  were  used to  reduce  the
Company's  outstanding  indebtedness  under its commercial  paper  program.  The
remaining  availability  under the  Securitization  Facility will be used, among
other purposes, to further reduce debt.

On May 4, 1999, the Board of Directors  declared a quarterly  dividend of $0.275
per Common Share payable on June 3, 1999, to holders of record on May 20 , 1999.

Cash Flows for the Three Months Ended March 31, 1999

During the first  quarter  ended March 31, 1999,  the  Company's  cash  position
decreased  $67.7  million to $108.4  million.  Net cash  provided  by  operating
activities was $171.5  million  including the receipt of $222.0 million from the
sale of trade and credit card  receivables  under the  Company's  Securitization
Facility.

Net cash used in investing  activities  during the quarter  ended March 31, 1999
totaled $51.4 million including $35.3 million for capital expenditures and $18.3
million for refinery maintenance turnaround costs.

Net cash used in financing  activities  during the quarter  ended March 31, 1999
totaled $189.0 million,  including  payments to reduce short-term  borrowings of
$162.6 million and for cash dividends totaling $23.8 million.

Exchange Rates

The value of the  Canadian  dollar  relative  to the U.S.  dollar  has  weakened
substantially  since the acquisition of the Canadian  operations in 1992. As the
Company's Canadian  operations are in a net asset position,  the weaker Canadian
dollar has reduced, in U.S. dollars,  the Company's net equity at March 31, 1999
by $104.8  million.  Although the Company expects the exchange rate to fluctuate
during 1999, it cannot reasonably predict its future movement.

With the exception of its crude oil costs,  which are U.S.  dollar  denominated,
fluctuations  in the Canadian  dollar  exchange rate will affect the U.S. dollar
amount of  revenues  and related  costs and  expenses  reported by the  Canadian
operations.  The potential impact on the refining margin of fluctuating exchange
rates together with U.S. dollar  denominated crude oil costs is mitigated by the
Company's pricing policies in the Northeast System,  which generally pass on any
change in the cost of crude oil.  Retail  margins,  on the other hand, have been
adversely affected by exchange rate fluctuations as competitive  pressures have,
from  time to time,  limited  the  Company's  ability  to  promptly  pass on the
increased  costs to the ultimate  consumer.  The Company has considered  various
strategies to manage  currency  risk,  and it hedges the Canadian  currency risk
when such hedging is considered economically appropriate.

Year 2000 Issue

State of Readiness
In 1997,  the  Company  commenced  efforts  to  address  Year  2000  issues  and
subsequently  formalized  an  enterprise-wide  effort to assess and  mitigate or
eliminate the business risk associated with Year 2000 issues, focusing on:

  - information technology (IT) computer hardware and software systems,

  - internal  process  control  equipment  outside  of  the  IT area used in the
    refining or retail operations, and

  - interfaces and support services from key suppliers, vendors and customers.



A Company-wide  process is in place to inventory,  assess,  test,  remediate and
develop  contingency  plans for addressing the Year 2000 issues described above.
The process is ongoing and is periodically reassessed as new information becomes
known,  and the process is revised  accordingly.  The  Company has also  engaged
outside consultants to assist in addressing its Year 2000 issues.

The Company's Northeast IT systems are not Year 2000 compliant. As a result, the
Company is implementing a new stand-alone  enterprise-wide  IT system which will
bring the  Northeast  into  compliance  by the third  quarter of 1999.  This new
enterprise-wide  IT system will also be implemented in the US operations  during
the fourth quarter of 1999 because it offers superior technological enhancements
and operating  efficiencies not available in the existing US IT system. The cost
of the new  enterprise-wide IT system for the Northeast and US is expected to be
approximately  $48.0 million,  with most of the costs being  capitalized.  As of
March 31, 1999,  the Company has incurred  $13.2 million of costs related to the
new IT system.

The Company  believes it has identified most of the  significant  exposure items
associated with internal  process  control  equipment used at the refineries and
throughout  the  retail  operations,  and has  implemented  a plan to bring such
equipment into Year 2000 compliance.  The Company has also corresponded with its
key  suppliers,  vendors  and  customers  and has  developed  a plan to mitigate
potential exposure areas. The estimated cost to be incurred for the verification
and testing of the systems  implemented  in 1995 and the non-IT and  third-party
corrective action plans range from $28.2 million to $44.0 million,  with most of
the costs  being  capitalized.  The actual  costs  incurred  will  depend on the
alternative chosen for each corrective action.  Management  anticipates that all
corrective  actions will be  completed  by December  31, 1999 to ensure  minimal
disruption to operations as the new millennium begins.

Risks
Certain Year 2000 risk factors which could have a material adverse effect on the
Company's results of operations, liquidity, and financial condition include, but
are not limited to, failure to identify  critical systems which could experience
failures, errors in efforts to correct problems, unexpected or extended failures
by key suppliers,  vendors and customers, and failures in global banking systems
and commodity exchanges.

As a matter of operating policy, the Company routinely  analyzes  production and
automation systems for potential  failures,  such as interruptions in the supply
of raw materials or  utilities.  It is not  anticipated  that a problem in these
areas will have a significant impact on the Company's ability to continue normal
business activities.  In addition,  it is not expected that these failures would
impact  safety or the  environment  nor have a material  impact on production or
sales. Any problems in these systems can be dealt with using existing  operating
procedures.

The worst case scenario  would be that the  Company's  failure or the failure of
key suppliers,  vendors and customers to correct material Year 2000 issues could
result in serious disruptions in normal business activities and operations. Such
disruptions  could  prevent the Company from refining  crude oil and  delivering
refined  products to  customers.  While the Company does not expect a worst case
scenario,  if it were to occur and could not be  corrected  on a timely basis or
otherwise  mitigated  by  contingency  plans,  it could have a material  adverse
impact on the Company's results of operations, liquidity and financial position.

Contingency Plans
Based on the  current  assessments  and  analysis  of the  Company's  Year  2000
readiness and that of key suppliers,  vendors and customers,  Year 2000 specific
contingency  plans are being  developed for critical  business  operations.  The
Company's US IT systems were initially assessed as being fundamentally Year 2000
compliant  resulting  from the 1995  implementation  of a new IT system  and the
migration  in early 1998 of Total's  operations  to such new system at a cost of
$4.3 million. As a result of recent declarations by the vendor who developed the
system  implemented  in  1995,  the  Company  has  decided,  as a  part  of  its
contingency planning, to verify and test certain aspects of these systems during
1999 to mitigate as much as possible any material adverse impact which may arise
from  possible  Year 2000 issues.  Those  systems  would only be used in the new
millenium as a contingency in the event the new  enterprise-wide  IT systems are
not yet operating.

For the remainder of 1999, the Year 2000  contingency  plans will be adjusted or
new plans developed as circumstances  warrant. The Company's current and planned



activities  with  respect to the Year 2000 issue are  expected to  significantly
reduce the Company's level of uncertainty  about the magnitude of the risk posed
by the Year 2000 issue and, in  particular,  about the Year 2000  compliance and
readiness of its key suppliers,  vendors,  and customers.  The Company  believes
that,  with the  implementation  of new IT systems and completion of the planned
activities as scheduled, the possibility of significant  interruptions of normal
operations should be reduced.

See "Certain Forward-Looking Statements."

Certain Forward-Looking Statements

This quarterly report on Form 10-Q contains certain "forward-looking" statements
as such term is defined in the U. S. Private Securities Litigation Reform Act of
1995 and information relating to the Company and its subsidiaries that are based
on the beliefs of  management  as well as  assumptions  made by and  information
currently  available  to  management.  When  used  in  this  report,  the  words
"anticipate," "believe," "estimate," "expect," and "intend" and words or phrases
of similar  expressions,  as they relate to the Company or its  subsidiaries  or
management,  identify  forward-looking  statements.  Such statements reflect the
current  views of  management  with respect to future  events and are subject to
certain  risks,  uncertainties  and  assumptions  relating to the operations and
results of operations,  including as a result of competitive factors and pricing
pressures,  shifts in market demand and general  economic  conditions  and other
factors.

Should one or more of these risks or  uncertainties  materialize,  or should any
underlying  assumptions  prove  incorrect,  actual  results or outcomes may vary
materially from those  described  herein as  anticipated,  believed,  estimated,
expected or intended.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

The Company is exposed to various  market risks,  including  changes in interest
rates, foreign currency rates and commodity prices related to crude oil, refined
products and natural gas. To manage or reduce  these market  risks,  the Company
uses interest rate swaps, foreign exchange contracts,  and commodity futures and
price swap  contracts.  The Company's  policy  governing the use of  derivatives
requires that every  derivative  relate to an underlying,  offsetting  position,
anticipated  transaction  or firm  commitment  and  prohibits  the use of highly
complex or leveraged  derivatives.  Beginning in 1999,  the Company  revised its
feedstock  procurement  program  to  allow  for  limited  discretionary  hedging
activities based on expectations of future market  conditions.  A summary of the
Company's  primary  market risk  exposures and its use of  derivative  financial
instruments is presented below.

Interest Rate Risk

The Company is subject to interest  rate risk on its  long-term  fixed  interest
rate debt.  Commercial  paper  borrowings and borrowings  under revolving credit
facilities  do not give rise to  significant  interest  rate risk because  these
borrowings have maturities of less than three months. The carrying amount of the
Company's  floating interest rate debt approximates fair value.  Generally,  the
fair market value of debt with a fixed  interest  rate will increase as interest
rates fall, and the fair market value will decrease as interest rates rise. This
exposure to interest rate risk is managed by obtaining  debt that has a floating
interest rate or using interest rate swaps to change fixed interest rate debt to
floating interest rate debt. Generally,  the Company maintains floating interest
rate debt of between 35% and 45% of total  debt.  Interest  rates have  remained
relatively  stable over the past year and the Company  anticipates such rates to
remain relatively stable over the next year.

The following table provides  information about the Company's long-term debt and
interest rate swaps,  both of which are sensitive to changes in interest  rates.
For long-term debt,  principal cash flows and related  weighted average interest
rates by expected  maturity  dates,  after  consideration  of  refinancing,  are



presented.  For interest rate swaps,  the table  presents  notional  amounts and
weighted  average  interest  rates by  expected  (contractual)  maturity  dates.
Notional amounts are used to calculate the contractual  payments to be exchanged
under the contract. Weighted average floating rates are based on implied forward
rates in the yield curve at March 31, 1999.


                                              Expected Maturity - Year Ending December 31,
                                 -------------------------------------------------------------------
                                                                                                          Fair Value
                                 1999      2000      2001      2002      2003      Thereafter  Total     March 31,1999
                                 ----      ----      ----      ----      ----      ----------  -----     -------------
                                                                  (in millions)
                                                                                 
Long-term Debt:
   Fixed rate.................. $ 3.6     $14.7     $86.5     $492.2    $35.0     $914.1     $1,546.1    $1,572.8
     Average interest rate......  8.6%      9.3%      9.6%       8.8%     8.9%       7.6%         8.1%        N/A
   Floating rate............... $   -     $   -     $   -     $220.9    $   -     $    -     $  220.9    $  220.9
     Average interest rate......    -%        -%        -%       5.1%       -%         -%         5.1%        N/A

Interest Rate Swaps:
   Fixed to floating........... $   -     $   -     $   -     $200.0    $   -     $250.0     $  450.0    $  450.0
     Average pay rate........... 4.88%     5.23%      5.57%      5.79%    5.85%      6.32%        5.90%       N/A
     Average receive rate....... 6.43%     6.43%      6.43%      6.43%    6.59%      6.85%        6.66%       N/A



Foreign Currency Risk

The Company  periodically  enters into short-term  foreign exchange contracts to
manage its exposure to exchange rate  fluctuations  on the trade payables of its
Canadian  operations  that are  denominated  in U.S.  dollars.  These  contracts
involve the exchange of Canadian and U.S.  currency at future  dates.  Gains and
losses on these contracts  generally  offset losses and gains on the U.S. dollar
denominated  trade  payables.  At March 31,  1999,  the Company  had  short-term
foreign exchange  contracts  totaling $16.7 million.  The Company's  exposure to
market risk is minimal on these contracts as they matured on April 1, 1999.

The Company  generally  does not hedge for the effects of foreign  exchange rate
fluctuations  on the  translation  of  its  foreign  results  of  operations  or
financial position.

Commodity Price Risk

The  Company is subject to the market  risk  associated  with  changes in market
prices of its underlying crude oil,  refined products and natural gas;  however,
such changes in values are generally offset by changes in the sales price of the
Company's  refined  products.  Price swaps are price  hedges for which gains and
losses are recognized when the hedged  transactions occur;  however,  losses are
recognized when future prices are not expected to recover.

As of March 31, 1999, the Company had  outstanding  commodity  futures and price
swap  contracts to buy $586.0  million and sell $374.6  million of crude oil and
refined products or to settle differences between a fixed price and market price
on aggregate notional quantities of 6.4 million barrels of crude oil and refined
products  which mature on various  dates  through  June 2002.  The fair value of
commodity futures contracts is based on quoted market prices.  The fair value of
price swap  contracts is determined by comparing the contract price with current
published  quotes for  futures  contracts  corresponding  to the period that the
anticipated transactions are expected to occur.



The information  below reflects the Company's price swaps and futures  contracts
that are sensitive to changes in crude oil or refined product  commodity prices.
The table  presents the notional  amounts in barrels for crude oil, the weighted
average  contract  prices and the total  contract  amount by  expected  maturity
dates.  Contract  amounts are used to  calculate  the  contractual  payments and
quantity of barrels of crude oil to be exchanged under the futures contract.



                                                                                                              Weighted
                                                                      Fair                    Contract        Average
                                                       Carrying       Value     Contract      Volumes          Price
Year Ending December 31,                                Amount       Amount      Amount      In Barrels      Per Barrel
                                                       --------      ------     --------     ----------      ----------
                                                                 (in millions, except weighted average price)
                                                                                               
Crude Procurement:
Futures contracts - buy:
  1999............................................      $11.5        $16.9       $189.5          12.0         $15.80
  2000............................................        4.0          4.0         54.7           3.4          15.85

Futures contracts - sell:
  1999............................................      (18.4)       (43.0)       296.9          18.1          16.42

Price swaps:
  2002............................................       (9.1)       (13.4)       140.0           6.4          22.00

Discretionary:
Futures contracts - buy:
  1999............................................       35.5         35.5        201.9          12.5          16.18

Futures contracts - sell:
  1999............................................      (17.3)       (17.3)        77.7           4.9          15.75



PART II - OTHER INFORMATION

Item 1.  Legal Proceedings

         None.

Item 4.  Submission Of Matters To A Vote Of Security Holders

The Company's 1999 Annual Meeting of Stockholders was held on May 4, 1999 in San
Antonio,  Texas.  At  the  meeting,  the  Company's  stockholders  elected  four
directors  to  serve  three-year  terms  expiring  in  2002,  and  ratified  the
appointment of Arthur  Andersen LLP to serve as independent  accountants for the
Company and its subsidiaries for 1999.

The  following  tables  summarize  the  number  of votes  cast for,  against  or
withheld, and number of abstentions as to each matter:

                              Election of Directors

     Name                    Total Votes For             Total Votes Withheld

H. Frederick Christie          77,119,910                      275,158
W.H. Clark                     77,115,798                      279,270
Jean R. Gaulin                 77,115,014                      280,054
Bob Marbut                     77,124,873                      270,195


         Ratification of Arthur Andersen LLP as Independent Accountants

       For                       Against                         Abstain

    77,145,166                   57,336                          192,566

Item 6.  Exhibits and Reports on Form 8-K

(a) Exhibits

    10.1  Performance Support Agreement dated March  29, 1999 among the Company,
          Asset  Securitization  Cooperative  Corporation  (ASCC),  and Canadian
          Imperial Bank of Commerce (CIBC).

    10.2  Credit Card Receivables Purchase Agreement  dated March 29, 1999 among
          Coyote   funding,  L.L.C.  (Coyote),  Diamond  Shamrock  Refining  and
          Marketing Company (DSRMC), ASCC and CIBC.

    10.3  Trade  Receivables  Purchase  Agreement  dated  March  29, 1999  among
          Coyote, DSRMC, ASCC and CIBC.

    27.1  Financial Data Schedule

(b) Reports on Form 8-K

    None.


                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Company
has duly  caused  this  report  to be signed  on its  behalf by the  undersigned
thereunto duly authorized.

ULTRAMAR DIAMOND SHAMROCK CORPORATION


By:  /s/ H. Pete Smith
         H. PETE SMITH
         EXECUTIVE VICE PRESIDENT
         AND CHIEF FINANCIAL OFFICER
         May 13, 1999