WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

  

<ARTICLE> 6                       
<CIK>                356865
<NAME>               OPPENHEIMER LIFESPAN INCOME FUND-C
<SERIES>                                                                 
   <NUMBER>          11
   <NAME>            Oppenheimer Series Fund, Inc.
       
                                                                     
<PERIOD-TYPE>                                                           12-MOS
<FISCAL-YEAR-END>                                                       OCT-31-1997
<PERIOD-START>                                                          NOV-01-1996
<PERIOD-END>                                                            OCT-31-1997
<INVESTMENTS-AT-COST>                                                                  27,723,982
<INVESTMENTS-AT-VALUE>                                                                 29,794,676
<RECEIVABLES>                                                                             444,148
<ASSETS-OTHER>                                                                              1,639
<OTHER-ITEMS-ASSETS>                                                                      353,691
<TOTAL-ASSETS>                                                                         30,594,154
<PAYABLE-FOR-SECURITIES>                                                                  433,257
<SENIOR-LONG-TERM-DEBT>                                                                         0
<OTHER-ITEMS-LIABILITIES>                                                                 106,614
<TOTAL-LIABILITIES>                                                                       539,871
<SENIOR-EQUITY>                                                                                 0
<PAID-IN-CAPITAL-COMMON>                                                               27,577,259
<SHARES-COMMON-STOCK>                                                                       2,893
<SHARES-COMMON-PRIOR>                                                                          95
<ACCUMULATED-NII-CURRENT>                                                                   2,079
<OVERDISTRIBUTION-NII>                                                                          0
<ACCUMULATED-NET-GAINS>                                                                   404,251
<OVERDISTRIBUTION-GAINS>                                                                        0
<ACCUM-APPREC-OR-DEPREC>                                                                2,070,694
<NET-ASSETS>                                                                               32,102
<DIVIDEND-INCOME>                                                                         273,552
<INTEREST-INCOME>                                                                       1,686,587
<OTHER-INCOME>                                                                                  0
<EXPENSES-NET>                                                                            408,718
<NET-INVESTMENT-INCOME>                                                                 1,551,421
<REALIZED-GAINS-CURRENT>                                                                  425,024
<APPREC-INCREASE-CURRENT>                                                               1,052,959
<NET-CHANGE-FROM-OPS>                                                                   3,029,404
<EQUALIZATION>                                                                                  0
<DISTRIBUTIONS-OF-INCOME>                                                                     908
<DISTRIBUTIONS-OF-GAINS>                                                                       77
<DISTRIBUTIONS-OTHER>                                                                           0
<NUMBER-OF-SHARES-SOLD>                                                                     2,712
<NUMBER-OF-SHARES-REDEEMED>                                                                     0
<SHARES-REINVESTED>                                                                            86
<NET-CHANGE-IN-ASSETS>                                                                  3,269,668
<ACCUMULATED-NII-PRIOR>                                                                        11
<ACCUMULATED-GAINS-PRIOR>                                                                 370,133
<OVERDISTRIB-NII-PRIOR>                                                                         0
<OVERDIST-NET-GAINS-PRIOR>                                                                      0
<GROSS-ADVISORY-FEES>                                                                     212,649
<INTEREST-EXPENSE>                                                                              0
<GROSS-EXPENSE>                                                                           415,679
<AVERAGE-NET-ASSETS>                                                                       19,989
<PER-SHARE-NAV-BEGIN>                                                                          10.66
<PER-SHARE-NII>                                                                                 0.55
<PER-SHARE-GAIN-APPREC>                                                                         0.58
<PER-SHARE-DIVIDEND>                                                                            0.54
<PER-SHARE-DISTRIBUTIONS>                                                                       0.15
<RETURNS-OF-CAPITAL>                                                                            0.00
<PER-SHARE-NAV-END>                                                                            11.10
<EXPENSE-RATIO>                                                                                 2.20
<AVG-DEBT-OUTSTANDING>                                                                          0
<AVG-DEBT-PER-SHARE>                                                                            0.00