TOSCO CORPORATION

                     PRO FORMA COMBINED FINANCIAL STATEMENTS
                                    UNAUDITED

     The following pro forma combined balance sheet of Tosco as of December 31,
1995 and the combined statements of operations for the year then ended, give
effect to (i) the purchase of an aggregate of 16,555,852 shares of Circle K
Common Stock following the financing of the estimated cash to be paid pursuant
to the Stock Sale Agreement and (ii) the acquisition of the remaining shares of
Circle K Common Stock pursuant to the Merger Agreement, including shares
expected to be issued upon the exercise of outstanding options. The pro forma
balance sheet assumes that the transactions occurred as of the balance sheet
date. The pro forma combined statement of income gives effect to these
transactions as if they had occurred at the beginning of the period presented.
The pro forma combined financial statements may not be indicative of the results
that actually would have occurred if the Merger had occurred prior to the dates
indicated or the results which may be obtained in the future. The pro forma
combined statement of operations does not reflect the possible improvement in
operating contribution or the planned reduction in operating and administrative
costs expected from the consolidation of the Seattle, Washington office of Tosco
with the Phoenix, Arizona office of Circle K, net of non-recurring costs of
consolidation. The information presented herein should be read in conjunction
with the Unaudited Pro Forma Combined Financial Information, including the notes
thereto, and the separate historical consolidated financial statements of Tosco
and Circle K.

                                       37




                                             TOSCO CORPORATION AND THE CIRCLE K CORPORATION

                                                   PRO FORMA COMBINED BALANCE SHEET
                                                        As of December 31, 1995
                                               (in thousands, except per share amounts)
                                                             (Unaudited)



                                         HISTORICAL (NOTE A)
                                ---------------------------------------
                                  TOSCO        CIRCLE K    CONSOLIDATED       PRO FORMA ADJUSTMENTS       ELIMINATIONS    PRO FORMA
                                ---------     ---------    ------------    ----------------------------   ------------    ---------
                                                                                                           
Cash, cash equivalents,
  short-term investments
  and deposits ................$   48,273    $   31,601    $   79,874    $  (5,300)(e)    $ (19,713)(c)                  $   54,861
Other current assets ..........   833,168       225,462     1,058,630                                                     1,058,630
                                ---------     ---------    ----------     ---------       ---------                      ----------
Total current assets ..........   881,441       257,063     1,138,504       (5,300)         (19,713)                      1,113,491
                                ---------     ---------    ----------     ---------       ---------                      ----------
Property and equipment ........   961,418       584,853     1,546,271                                                     1,546,271
Intangibles, net of 
  accumulated amortization ....                 117,959       117,959        1,600 (f)      482,880 (d)                     607,239
                                                                             4,800 (e)                                             
Other long-term assets ........   160,312        70,954       231,266        2,750 (a)       (1,600)(f)                     232,416
Investment in Circle K ........                                            486,693 (a)       41,701 (c)    (291,883)               
                                                                           246,369 (b)     (482,880)(d)                            
                               ----------    ----------    ----------    ---------        ---------       ---------      ----------
Total assets ..................$2,003,171    $1,030,829    $3,034,000    $ 736,912        $  20,388       $(291,883)     $3,499,417
                               ==========    ==========    ==========    =========        =========       =========      ==========
Current liabilities ...........$  669,520    $  320,658    $  990,178                                                    $  990,178
Current maturities of 
  long-term obligations .......       771        25,181        25,952                                                        25,952
                                ---------     ---------    ----------                                                    ----------
Total current liabilities .....   670,291       345,839     1,016,130                                                     1,016,130
                                ---------     ---------    ----------                                                    ----------
Long-term obligations .........   624,036       172,298       796,334      (67,432)(f)      430,305 (a)                  1,226,639 
                                                                                             67,432 (f)                            
Other liabilities .............    81,734       220,809       302,543                                                       302,543
Shareholders' equity                                                                   
Common stock ..................    29,714           244        29,958          934 (a)          383 (c)        (244)         34,920
                                                                             3,889 (b)
Additional paid in capital ....   640,306       237,939       878,245       58,204 (a)       21,605 (c)    (237,939)        962,095
                                                                           242,480 (b)         (500)(e)                            
Retained earnings .............    27,903        53,700        81,603                                       (53,700)         27,903
Reductions from capital .......   (70,813)                    (70,813)                                                      (70,813)
                               ----------    ----------    ----------    ---------        ---------       ---------      ----------
                               $  627,110    $  291,883    $  918,993    $ 305,507        $  21,488       $(291,883)     $  954,105
                               ----------    ----------    ----------    ---------        ---------       ---------      ----------
Total liabilities and equity ..$2,003,171    $1,030,829    $3,034,000    $ 238,075        $ 519,225       $(291,883)     $3,499,417
                               ==========    ==========    ==========    =========        =========       =========      ==========

- ------------
Pro forma Adjustments:

(a)  Records purchase of 16,555,852 shares of Circle K Common Stock from the
     Selling Shareholders under the Stock Sale Agreement for $25.825 per share
     in cash and approximately 1,245,000 shares of Tosco Common Stock valued at
     $3.572 per share of Circle K Common Stock (total value of $29.397 based
     upon an assumed Average Tosco Stock Price (as defined in the Merger
     Agreement) of $47.5125 per share). Cash proceeds of $427.56 million is
     expected to be generated from the issuance of $200 million of term debt,
     net of discounts and fees totalling $2.75 million, with the balance from
     cash borrowings from Tosco's working capital facility.

(b)  Records issuance of approximately 5,185,000 shares of Tosco Common Stock in
     exchange for 7,825,715 shares of Circle K Common Stock held by shareholders
     other than Selling Shareholders ("Exchanging Shareholders"). Based upon an
     assumed Average Tosco Stock Price of $47.5125 per share, the value per
     share of Circle K Common Stock to the Exchanging Shareholders is $31.482.

(c)  Records projected exercise of options to purchase 1,813,655 shares of
     Circle K Common Stock outstanding at January 31, 1996 which are or become
     vested prior to the effective time of the Merger and the cancellation for
     cash of the remaining 435,913 options which vest at the effective time of
     the Merger. The gain on the exercise of vested options (measured by the
     difference between the value of Circle K Common Stock at the dates of
     exercise and the exercise prices of the underlying options) is expected to
     be paid in cash and shares of Circle K Common Stock (the stock portion of
     which will be exchanged for Tosco Common Stock). Based on an Average Tosco
     Stock Price of $47.5125 per share, the exercise of vested options is
     expected to result in the payment of approximately $13.081 million and the
     issuance of about 511,000 shares of Tosco Common Stock. The cancellation of
     the remaining options is expected to cost approximately $6.63 million.

(d)  Records Merger of Circle K with Tosco Acquisition Sub.

(e)  Records assumed costs of issuance of Tosco Common Stock ($.5 million) and
     other transaction costs of $4.8 million.

(f)  Records retirement of $67.432 million of debt of Circle K from cash
     borrowings under Tosco's revolving credit facility and the write off of
     deferred financing costs related to the debt retired.

                                       38



                 TOSCO CORPORATION AND THE CIRCLE K CORPORATION

                     PRO FORMA COMBINED STATEMENT OF INCOME
                      For the Year Ended December 31, 1995
                      (In thousands, except per share data)
                                   (Unaudited)

                                                  HISTORICAL (NOTE A)
                                      -----------------------------------------                                    PRO FORMA
                                         TOSCO        CIRCLE K     CONSOLIDATED         PRO FORMA ADJUSTMENTS       (NOTE B)
                                      -----------    ----------     -----------     ----------------------------   -----------
                                                                                                         
Sales ............................... $7,284,051     $3,540,531     $10,824,582      $(526,000)(k)                 $10,298,582
Cost of sales ....................... (7,004,501)    (2,747,071)     (9,751,572)                     $526,000(k)    (9,225,572)
Operating and selling, general and
 administrative expense .............    (95,858)      (709,559)       (805,417)       (11,787)(g)                    (817,204)
                                                                                       (32,273)(h)                 -----------
Interest expense, net ...............    (56,253)       (26,547)        (82,800)          (275)(i)                    (115,348)
                                      ----------     ----------     -----------      ---------       --------      -----------
                                      (7,156,612)    (3,483,177)    (10,639,789)       (44,335)       526,000      (10,158,124)
                                      ----------     ----------     -----------      ---------       --------      -----------
Income before income taxes ..........    127,439         57,354         184,793       (570,335)       526,000           140,458
Provision for income taxes ..........    (50,381)       (23,956)        (74,337)        12,856 (j)                     (61,481)
                                      ----------     ----------     -----------      ---------       --------      -----------
Income before extraordinary item .... $   77,058     $   33,398     $   110,456      $(557,479)      $526,000      $    78,977
                                      ==========     ==========     ===========      =========       ========      ===========

Earnings per share before
 extraordinary item:
  Primary: ..........................      $2.06          $1.36                                                          $1.78 (l)
                                           =====          =====                                                          =====    
  Fully diluted: ....................      $2.04          $1.36                                                          $1.77 (l)
                                           =====          =====                                                          =====    

- --------------------------------
Pro forma adjustments:          

     (g)  Records amortization of $607 million of intangibles over 40 years (the
          revised useful life over which the benefit of the intangible assets
          are expected to be realized).

     (h)  Records interest at 7 1/2% on $430.305 million of additional debt
          incurred to finance the acquisition.

     (i)  Records amortization of debt financing costs over assumed 10 year term
          of debt.

     (j)  Records income taxes on taxable pro forma adjustments at Tosco's
          current effective tax rate of 39.5%. No deduction has been taken on
          amortization of intangibles which will not be deductible for income
          tax purposes.

     (k)  Removes excise taxes of Circle K included in sales and cost of sales
          for consistency of presentation.

     (l)  Pro forma earnings per share are based on the number of common and
          common equivalent shares that would have been outstanding had the
          Merger occurred on January 1, 1996.

Note A--  The historical balance sheets of Tosco and Circle K are as of December
          31, 1995 and January 31, 1996, respectively. The related historical
          statements of income of Tosco and Circle K are as of the years ended
          December 31, 1995 and January 31, 1996, respectively.

Note B--  The pro forma income statement does not reflect the improvement in
          operating contribution anticipated from the Merger or the planned
          reduction in operating and administrative costs expected from the
          consolidation of the Seattle, Washington office of Tosco with the
          Phoenix, Arizona office of Circle K, net of non-recurring costs of
          consolidation.

                                       39