EXHIBIT 23.1
CONSENT OF INDEPENDENT ACCOUNTANTS
As independent public accountants, we hereby consent to the incorporation by
reference in this Registration Statement of our report dated February 29, 2000
included in Ultramar Diamond Shamrock Corporation's Form 10-K for the year ended
December 31, 1999 and our report dated June 16, 2000 included in the UDS 401(k)
Retirement Savings Plan's Form 11-K for the year ended December 31, 1999 and to
all references to our Firm included in this Registration Statement.
/s/ ARTHUR ANDERSEN LLP
San Antonio, Texas
October 2, 2000
