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

                                                       
<PERIOD-TYPE>                                              6-MOS
<FISCAL-YEAR-END>                                          DEC-31-1999
<PERIOD-END>                                               JUN-30-1999
<CASH>                                                          11,300
<SECURITIES>                                                         0
<RECEIVABLES>                                                  215,100
<ALLOWANCES>                                                     1,700
<INVENTORY>                                                    228,500
<CURRENT-ASSETS>                                               463,500
<PP&E>                                                       1,398,600
<DEPRECIATION>                                                 479,500
<TOTAL-ASSETS>                                               1,522,500
<CURRENT-LIABILITIES>                                          274,600
<BONDS>                                                        524,000
<PREFERRED-MANDATORY>                                                0
<PREFERRED>                                                    165,000
<COMMON>                                                         5,400
 <OTHER-SE>                                                    415,600
<TOTAL-LIABILITY-AND-EQUITY>                                 1,522,500
<SALES>                                                      1,262,500
<TOTAL-REVENUES>                                             1,262,700
<CGS>                                                        1,135,700
<TOTAL-COSTS>                                                1,135,700
<OTHER-EXPENSES>                                                34,300
<LOSS-PROVISION>                                                     0
<INTEREST-EXPENSE>                                              24,500
<INCOME-PRETAX>                                                 51,900
<INCOME-TAX>                                                    19,100
<INCOME-CONTINUING>                                             32,800
<DISCONTINUED>                                                       0
<EXTRAORDINARY>                                                      0
<CHANGES>                                                            0
<NET-INCOME>                                                    32,800
<EPS-BASIC>                                                     0.83
<EPS-DILUTED>                                                     0.76
<FN>