<ARTICLE>  5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM TESORO
PETROLEUM CORPORATION'S FINANCIAL STATEMENTS AS OF AND FOR THE NINE MONTH
PERIOD ENDED SEPTEMBER 30, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>  1,000

                                                       
<PERIOD-TYPE>                                                     9-MOS
<FISCAL-YEAR-END>                                           DEC-31-1999
<PERIOD-END>                                                SEP-30-1999
<CASH>                                                           15,600
<SECURITIES>                                                          0
<RECEIVABLES>                                                   246,300
 <ALLOWANCES>                                                     1,700
<INVENTORY>                                                     197,700
<CURRENT-ASSETS>                                                468,500
<PP&E>                                                        1,434,900
<DEPRECIATION>                                                  496,600
<TOTAL-ASSETS>                                                1,557,300
<CURRENT-LIABILITIES>                                           306,100
<BONDS>                                                         491,000
<PREFERRED-MANDATORY>                                                 0
<PREFERRED>                                                     165,000
<COMMON>                                                          5,400
 <OTHER-SE>                                                     438,800
<TOTAL-LIABILITY-AND-EQUITY>                                  1,557,300
<SALES>                                                       2,174,700
<TOTAL-REVENUES>                                              2,175,700
<CGS>                                                         1,963,900
<TOTAL-COSTS>                                                 1,963,900
<OTHER-EXPENSES>                                                 52,200
<LOSS-PROVISION>                                                      0
<INTEREST-EXPENSE>                                               36,500
<INCOME-PRETAX>                                                  95,400
<INCOME-TAX>                                                     37,300
<INCOME-CONTINUING>                                              58,100
<DISCONTINUED>                                                        0
<EXTRAORDINARY>                                                       0
<CHANGES>                                                             0
<NET-INCOME>                                                     58,100
<EPS-BASIC>                                                      1.52
<EPS-DILUTED>                                                      1.35
<FN>