EXHIBIT 12.3 PACCAR Inc COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES PURSUANT TO SEC REPORTING REQUIREMENTS (Thousands of Dollars) Six Months Ended June 30 1996 1995 - -------------------------------------------------------------------------------- FIXED CHARGES Interest expense PACCAR Inc and subsidiaries (1) $65,121 $59,079 Portion of rentals deemed interest 2,943 2,863 - -------------------------------------------------------------------------------- TOTAL FIXED CHARGES $68,064 $61,942 - -------------------------------------------------------------------------------- EARNINGS Income before taxes - PACCAR Inc and subsidiaries $138,392 $186,663 Fixed charges 68,064 61,942 - -------------------------------------------------------------------------------- EARNINGS AS DEFINED $206,456 $248,605 - -------------------------------------------------------------------------------- RATIO OF EARNINGS TO FIXED CHARGES 3.03X 4.01X - -------------------------------------------------------------------------------- (1) Exclusive of interest, if any, paid to PACCAR Inc. -13-