Exhibit 25.1

                             FORM T-1

               SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C.  20549

                     STATEMENT OF ELIGIBILITY
           UNDER THE TRUST INDENTURE ACT OF 1939 OF A
            CORPORATION DESIGNATED TO ACT AS TRUSTEE

               CHECK IF AN APPLICATION TO DETERMINE
               ELIGIBILITY OF A TRUSTEE PURSUANT TO
                SECTION 305(b)(2)           |__|


                        THE BANK OF NEW YORK
       (Exact name of trustee as specified in its charter)


New York                                                         13-5160382
(State of incorporation                     (I.R.S. employer
if not a U.S. national bank)                identification no.)

48 Wall Street, New York, N.Y.              10286
(Address of principal executive offices)    (Zip code)


                   ULTRAMAR DIAMOND SHAMROCK CORPORATION
            (Exact name of obligor as specified in its charter)


Delaware                                                         13-3663331
(State or other jurisdiction of             (I.R.S. employer
incorporation or organization)              identification no.)

9830 Colonnade Boulevard
San Antonio, Texas                          78230
(Address of principal executive offices)    (Zip code)


                          Senior Debt Securities
                     (Title of the indenture securities)

1.  General information.  Furnish the following information as to the
Trustee:

     (a)  Name and address of each examining or supervising authority to
which it is subject.






      Name                                        Address


      Superintendent of Banks of the State of    2 Rector Street, New York,
      New York                                   N.Y.  10006, and Albany,
                                                 N.Y. 12203

      Federal Reserve Bank of New York            33 Liberty Plaza, New York,
                                                 N.Y.  10045

     Federal Deposit Insurance Corporation      Washington, D.C. 20429

     New York Clearing House Association         New York, New York 10005

     (b)  Whether it is authorized to exercise corporate trust powers.

          Yes.

2.   Affiliations with Obligor.
     
     If the obligor is an affiliate of the trustee, describe each such
     affiliation. 

     None.

16.  List of Exhibits. 

     Exhibits identified in parentheses below, on file with the Commission,
     are incorporated herein by reference as an exhibit hereto, pursuant to
     Rule 7a-29 under the Trust Indenture Act of 1939 (the "Act") and 17
     C.F.R. 229.10(d).

     1.  A copy of the Organization Certificate of The Bank of New York
         (formerly Irving Trust Company) as now in effect, which contains
         the authority to commence business and a grant of powers to
         exercise corporate trust powers.  (Exhibit 1 to Amendment No. 1 to
         Form T-1 filed with Registration Statement No. 33-6215, Exhibits 
         1a and 1b to Form T-1 filed with Registration Statement No.
         33-21672 and Exhibit 1 to Form T-1 filed with Registration 
         Statement No. 33-29637.)

     4.  A copy of the existing By-laws of the Trustee.  (Exhibit 4 to
         Form T-1 filed with Registration Statement No. 33-31019.)

     6.  The consent of the Trustee required by Section 321(b) of the
         Act.  (Exhibit 6 to Form T-1 filed with Registration Statement 
         No. 33-44051.)

     7.  A copy of the latest report of condition of the Trustee 
         published pursuant to law or to the requirements of its 
         supervising or examining authority.




                           SIGNATURE

     Pursuant to the requirements of the Act, the Trustee, The Bank of New
York, a corporation organized and existing under the laws of the State of New
York, has duly caused this statement of eligibility to be signed on its
behalf by the undersigned, thereunto duly authorized, all in The City of New
York, and State of New York, on the 5th day of June, 1997.


                                         THE BANK OF NEW YORK



                                       By:  /S/MARY LAGUMINA     
                                       Name:  MARY LAGUMINA
                                       Title: ASSISTANT VICE PRESIDENT



                   Consolidated Report of Condition of

                           THE BANK OF NEW YORK

                 of 48 Wall Street, New York, N.Y. 10286
                   And Foreign and Domestic Subsidiaries,
a member of the Federal Reserve System, at the close of business December 31,
1996, published in accordance with a call made by the Federal Reserve Bank of
this District pursuant to the provisions of the Federal Reserve Act.

                                                   Dollar Amounts
ASSETS                                             in Thousands
Cash and balances due from depos-
  itory institutions:
  Noninterest-bearing balances and
  currency and coin                                $ 6,024,605
  Interest-bearing balances                            808,821
Securities:
  Held-to-maturity securities                        1,071,747
  Available-for-sale securities                      3,105,207
Federal funds sold in domestic offices
of the bank:                                         4,250,941
Loans and lease financing
  receivables:
  Loans and leases, net of unearned
    income                     31,962,915
  LESS: Allowance for loan and
    lease losses                  635,084
  LESS: Allocated transfer risk
    reserve                           429
    Loans and leases, net of unearned
    income, allowance, and reserve                  31,327,402
Assets held in trading accounts                      1,539,612
Premises and fixed assets (including
  capitalized leases)                                  692,317
Other real estate owned                                 22,123
Investments in unconsolidated
  subsidiaries and associated
  companies                                            213,512
Customers' liability to this bank on
  acceptances outstanding                              985,297
Intangible assets                                      590,973
Other assets                                         1,487,903
Total assets                                       $52,120,460

LIABILITIES
Deposits:
  In domestic offices                              $25,929,642
  Noninterest-bearing          11,245,050
  Interest-bearing             14,684,592
  In foreign offices, Edge and
  Agreement subsidiaries, and IBFs                  12,852,809
  Noninterest-bearing             552,203
   Interest-bearing            12,300,606
Federal funds purchased and securities
  sold under agreements to repurchase
  in domestic offices of the
  bank and of its Edge and Agreement
  subsidiaries, and in IBFs:
  Federal funds purchased                            1,360,877
Securities sold under agreements
  to repurchase                                        226,158
Demand notes issued to the U.S.
  Treasury                                             204,987
Trading liabilities                                  1,437,445
Other borrowed money:
  With original maturity of one year
    or less                                          2,312,556
  With original maturity of more than
    one year                                            20,766
Bank's liability on acceptances exe-
  cuted and outstanding                              1,014,717
Subordinated notes and debentures                    1,014,400
Other liabilities                                    1,721,291
Total liabilities                                   48,095,648

EQUITY CAPITAL
Common stock                                           942,284
Surplus                                                731,319
Undivided profits and capital
  reserves                                           2,354,095
Net unrealized holding gains
  (losses) on available-for-sale
  securities                                             7,030
Cumulative foreign currency transla-
  tion adjustments                                  (    9,916)
Total equity capital                                 4,024,812
Total liabilities and equity
  capital                                          $52,120,460


     I, Robert E. Keilman, Senior Vice President and Comptroller of the
above-named bank do hereby declare that this Report of Condition has been
prepared in conformance with the instructions issued by the Board of
Governors of the Federal Reserve System and is true to the best of my
knowledge and belief.

                                               Robert E. Keilman

     We, the undersigned directors, attest to the correctness of this Report
of Condition and declare that it has been examined by us and to the best of
our knowledge and belief has been prepared in conformance with the
instructions issued by the Board of Governors of the Federal Reserve System
and is true and correct.

     J. Carter Bacot
     Thomas A. Renyi            Directors
     Alan R. Griffith