1 EXHIBIT 12.3 PACCAR Inc COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES PURSUANT TO SEC REPORTING REQUIREMENTS (Thousands of Dollars) Nine Months Ended September 30 1994 1993 ------------------------- FIXED CHARGES Interest expense PACCAR Inc and subsidiaries (1) $ 62,001 $ 47,323 Portion of rentals deemed interest 4,121 4,501 -------- -------- TOTAL FIXED CHARGES $ 66,122 $ 51,824 ======== ======== EARNINGS Income before taxes - PACCAR Inc and subsidiaries $230,205 $150,764 Fixed charges 66,122 51,824 -------- -------- EARNINGS AS DEFINED $296,327 $202,588 ======== ======== RATIO OF EARNINGS TO FIXED CHARGES 4.48X 3.91X (1) Exclusive of interest, if any, paid to PACCAR Inc. -12-