1 EXHIBIT 12 Statement re: Computation of Ratio of Earnings to Fixed Charges Quaker State Corporation and Subsidiaries For the Years Ended December 31, 1997, 1996 and 1995 (in thousands) 1997 1996 1995 - ------------------------------------------------------------------------------------ Interest expense $ 26,913 $ 12,609 $ 7,178 Interest factor of rental expense (1) 11,586 9,120 8,311 ---------------------------------- Total fixed charges $ 38,499 $ 21,729 $ 15,489 ==================================================================================== Income from continuing operations before income taxes $(11,389) $ 17,551 $ (5,723) Fixed charges 38,499 21,729 15,489 ---------------------------------- Total earnings $ 27,110 $ 39,280 $ 9,766 ==================================================================================== Ratio of earnings to fixed charges 0.7 1.8 0.6 ==================================================================================== (1) Interest factor of rental expense computed based on: (a) average interest factor from a sample of leases for operations representing in excess of 50% of rentals from continuing operations, and (b) one-third factor of rentals for other operations.