EXHIBIT 11 EQUISTAR CHEMICALS, LP STATEMENT SETTING FORTH DETAIL FOR COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES - UNAUDITED (Millions of Dollars) One Month Ended Year Ended Year Ended Six Months Six Months Six Months December 31, December 31, December 31, Ended June Ended June Ended June 1997 1998 1998 30, 1999 30, 1998 30, 1999 ------------ ------------ ------------ ------------ ------------ ----------- (historical) (historical) (pro forma) (historical) (historical) (pro forma) Income from operations before income taxes.... $ 7 $143 $154 $ 49 $165 $ 23 Fixed charges: Interest expense, gross................ $10 $156 $186 $ 89 $ 70 $115 Portion of rentals representative of interest............. $ 4 $ 37 $ 38 $ 18 $ 18 $ 18 --- ---- ---- ---- ---- ---- Total fixed charges..... $14 $193 $224 $107 $ 88 $133 --- ---- ---- ---- ---- ---- Earnings................ $21 $336 $378 $156 $253 $156 Ratio of earnings to fixed charges.......... 1.5 1.7 1.7 1.5 2.9 1.2 EQUISTAR CHEMICALS, LP STATEMENT SETTING FORTH DETAIL FOR COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES - UNAUDITED LYONDELL CONTRIBUTED BUSINESS (Millions of Dollars) Eleven Year Ended Months Ended December 31, November 30, -------------- 1997 1996 1995 1994 ------------ ---- ---- ---- Historical Information: Income from operations before income taxes........ $346 $158 $439 $215 Fixed charges: Interest expense, gross........................... $ 50 $ 65 $ 76 $ 73 Portion of rentals representative of interest..... $ 14 $ 15 $ 13 $ 10 Total fixed charges................................. $ 64 $ 80 $ 89 $ 83 Earnings............................................ $410 $238 $528 $298 Ratio of earnings to fixed charges.................. 6.4 3.0 5.9 3.6 EQUISTAR CHEMICALS, LP STATEMENT SETTING FORTH DETAIL FOR COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES - UNAUDITED MILLENNIUM CONTRIBUTED BUSINESS (Millions of Dollars) Eleven Year Ended Months Ended December 31, November 30, -------------- 1997 1996 1995 1994 ------------ ---- ---- ---- Historical Information: Income from operations before income taxes........ $243 $168 $415 $130 Fixed charges: Interest expense, gross........................... $ 66 $ 80 $ 80 $ 80 Portion of rentals representative of interest..... $ 13 $ 15 $ 14 $ 13 Total fixed charges................................. $ 79 $ 95 $ 94 $ 93 Earnings............................................ $322 $263 $509 $223 Ratio of earnings to fixed charges.................. 4.1 2.8 5.4 2.4