UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
( ) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
   Shapard, Robert S.
   P. O. Box 696000
   San Antonio, Texas  78269-6000
   USA
2. Issuer Name and Ticker or Trading Symbol
   Ultramar Diamond Shamrock Corporation
   (UDS)
3. IRS or Social Security Number of Reporting Person (Voluntary)

4. Statement for Month/Year
   August 31, 2000
5. If Amendment, Date of Original (Month/Year)

6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   ( ) Director ( ) 10% Owner (X) Officer (give title below) ( ) Other
   (specify below)
   Executive Vice President and Chief Financial Officer
7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person


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 Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned                                                 |
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1. Title of Security       |2.    |3.    |4.Securities Acquired (A)         |5.Amount of        |6.Dir |7.Nature of Indirect       |
                           | Transaction |  or Disposed of (D)              |  Securities       |ect   |  Beneficial Ownership     |
                           |      |      |                                  |  Beneficially     |(D)or |                           |
                           |      |    | |                  | A/|           |  Owned at         |Indir |                           |
                           | Date |Code|V|    Amount        | D |    Price  |  End of Month     |ect(I)|                           |
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Common Stock               |08/01/|A   |V|9,500             |A  |$22.8750   |9,500 (b)          |D     |                           |
                           |00    |    | |                  |   |           |                   |      |                           |
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 Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned                                                   |
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1.Title of Derivative |2.Con-  |3.   |4.    |5.Number of De |6.Date Exer|7.Title and Amount  |8.Price|9.Number    |10.|11.Nature of|
  Security            |version |Transaction | rivative Secu |cisable and|  of Underlying     |of Deri|of Deriva   |Dir|Indirect    |
                      |or Exer |     |      | rities Acqui  |Expiration |  Securities        |vative |tive        |ect|Beneficial  |
                      |cise    |     |      | red(A) or Dis |Date(Month/|                    |Secu   |Securities  |(D)|Ownership   |
                      |Price of|     |      | posed of(D)   |Day/Year)  |                    |rity   |Benefi      |or |            |
                      |Deriva- |     |      |               |Date |Expir|                    |       |ficially    |Ind|            |
                      |tive    |     |      |           | A/|Exer-|ation|   Title and Number |       |Owned at    |ire|            |
                      |Secu-   |     |    | |           | D |cisa-|Date |   of Shares        |       |End of      |ct |            |
                      |rity    |Date |Code|V|  Amount   |   |ble  |     |                    |       |Month       |(I)|            |
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Employee Stock Options|        |08/01|A   |V|36,400     |A  |(aa) |08/01|Common Stock|36,400 |$22.75 |36,400      |D  |            |
 (right to buy) (g)   |        |/00  |    | |           |   |     |/10  |            |       |       |            |   |            |
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                      |        |     |    | |           |   |     |     |            |       |       |            |   |            |
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Explanation of Responses:
(b)  9,500 of these shares were issued pursuant to Long Term Incentive Plans
and remain subject to forfeiture as
of August 31,
2000.
(g)  Employee stock options granted under the Company's Long Term Incentive
Plans.
(aa) Options granted to reporting person under Long Term Inventive Plan in
transactions exempt under Rule 16b-3.
The options become exercisable in 30%, 30% and 40% increments on August 1,
2001, August 1, 2002 and
August 1, 2003,
respectively.
SIGNATURE OF REPORTING PERSON
/s/ ROBERT S. SHAPARD (Power of Attorney)
DATE
September 11, 2000