EXHIBIT 12.3 PACCAR Inc COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES PURSUANT TO SEC REPORTING REQUIREMENTS (Thousands of Dollars) Three Months Ended March 31 1995 1994 - -------------------------------------------------------------------------------- FIXED CHARGES Interest expense PACCAR Inc and subsidiaries (1) $ 28,636 $ 17,999 Portion of rentals deemed interest 1,432 1,374 - -------------------------------------------------------------------------------- TOTAL FIXED CHARGES $ 30,068 $ 19,373 - -------------------------------------------------------------------------------- EARNINGS Income before taxes - PACCAR Inc and subsidiaries $ 83,198 $ 67,978 Fixed charges 30,068 19,373 - -------------------------------------------------------------------------------- EARNINGS AS DEFINED $113,266 $ 87,351 - -------------------------------------------------------------------------------- RATIO OF EARNINGS TO FIXED CHARGES 3.77X 4.51X - -------------------------------------------------------------------------------- <FN> (1) Exclusive of interest, if any, paid to PACCAR Inc.