EXHIBIT 10.57

                              RELOCATION AGREEMENT


THIS  AGREEMENT  dated as of this 2nd day of  December,  1996 is  entered by and
between H. Pete Smith (the "Employee") and Ultramar Corporation (the "Company").

1.   The Employee has entered into an employment  agreement dated as of November
     25,  1996  ("Employment  Agreement")  wherein  he has  agreed to accept the
     position  of  Executive  Vice  President  and Chief  Financial  Officer and
     relocate to the Corporate Headquarters located in San Antonio, Texas.

     This  Agreement  shall   supplement  the  Employment   Agreement  with  the
     following: the Employee shall be entitled to a one time Relocation Bonus of
     $150,000 less  required  withholdings  and the  provisions  and  allowances
     provided by the Company  Relocation  Program  Guidelines For Key Executives
     dated October 1996 ("Guidelines"), a copy of which is attached and has been
     provided to the Employee.  The Relocation Bonus will be due upon relocation
     but may be  deferred  for  payment  at a later  date at the  request of the
     Employee.

2.   The Employee may, at his  election,  voluntarily  terminate his  employment
     after 18 months from  December 3, 1996 (June 3, 1998) by giving at least 90
     days'  advance  written  notice to the  Company no later than March 3, 1998
     (the "Walk Right"). If such election is not made prior to March 4, 1998 the
     Walk Right shall thereafter terminate. In the event Employee exercises such
     "Walk Right" the Employee  shall receive the following  payments in lieu of
     the  payments  specified  in  paragraph 5 of the  Employment  Agreement.  A
     termination  during any period other than as specifically  described herein
     shall  be  treated  strictly  in  accordance  with  the  provisions  of the
     Employment  Agreement in effect at the time of termination and all payments
     due shall be only in accordance with the Employee
     Agreement.

     (a) The amount of  severance to be paid in a single lump sum within 30 days
         of the  termination  date shall be amount  payable under the Employment
         Agreement plus the present value of the benefit  accrued through to the
         termination date in the supplemental Executive Retirement Plan ("SERP")
         as applied for a termination for Good Reason, reduced by the Relocation
         bonus in paragraph 1.

     (b) Employee will be relocated at his request anywhere in the contiguous 48
         states  in  accordance  with  the  reimbursements,  allowances  and tax
         protection  as described in the  Guidelines.  However,  the  Relocation
         Allowance under item 12 of the Guidelines shall not be applicable.

3.   In the event of the  Employee's  Involuntary  Termination as defined in the
     Employment  Agreement  for a reason  other than cause  during the five year
     period   commencing   December  3,  1996,   including  death  or  permanent
     disability,  in addition to all other rights of the Employee the  following
     provisions will apply:

     (a) At the  Employee's  election in writing or the spouse's in the event of
         death, if made within one year of the event,  the Company will relocate
         the  Employee  and his  family  to  their  original  location  or other
         location of  Employee's  choosing  within the  contiguous  48 states in
         accordance  with the  reimbursements,  allowances and tax protection as
         describe in the Guidelines.

     (b) For this purpose,  however,  the Relocation Allowance described in item
         12 of the Guidelines shall not be applicable.

4.   The Employee  currently has a home loan dated August 1992 (the "Loan") with
     a current balance due and owing of $247,500. The Employee shall be entitled
     to carry  forward the Loan with  repayment  on the original  Loan  schedule
     (copy  attached)  provided  that the new mortgage on the San Antonio  house
     plus the Company Loan amount does not exceed 90% of the new house  purchase
     price.

5.   This  Agreement  shall be governed by and construed in accordance  with the
     laws of the  State of  Delaware  applicable  to  agreements  made and to be
     performed in that State.

6.   This Agreement shall supersede any and all existing  agreements written and
     oral  between  the  Employee  and  the  Employer  or any of its  affiliates
     relating to the Employee's  reimbursement and allowance for relocation.  It
     may not be  amended  except  by a  written  agreement  signed  by and  both
     parties.

7.   This  Agreement  shall  inure to the  benefit  of and be  binding  upon the
     parties hereto and their respective heirs, representatives,  successors and
     assigns.  The Agreement shall not be assignable by the Employee,  and shall
     be  assignable  by the  Company  only to any  corporation  or other  entity
     resulting from the  reorganization,  merger or consolidation of the Company
     with any other  corporation  or entity or any  corporation  or entity to or
     with which the Company's  business or substantially  all of its business or
     assets may be sold, exchanged or transferred, and it must be so assigned by
     the Company to, and accepted as binding upon it by, such other  corporation
     or   entity   in   connection   with  any  such   reorganization,   merger,
     consolidation,  sale, exchange or transfer (the provisions of this sentence
     also being applicable to any successive such transaction).

AGREED:


/s/ H. PETE SMITH                                      /S/ JEAN GAULIN
- -----------------                                      ---------------------
     Employee                                                Employer


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