Forbes Magazine Honors PACCAR Executive; PACCAR Celebrates Record Quarterly Results

BELLEVUE, Wash.--May 1, 2006--Forbes magazine (www.forbes.com) recently published its annual CEO pay-versus-performance review. In the pay-versus-performance rankings, Forbes evaluated 189 CEOs who met the qualification criteria of a minimum of six-year tenure as chief executive. The rankings were calculated by comparing company stock performance (including dividends) relative to peer companies and the S&P 500 Index. The final criterion was the executive's compensation trends during the previous years.

The scores were combined and the executive and company performance were ranked. PACCAR was identified as having one of the top 10 best-performing CEOs in the review.

                          Mark Pigott/PACCAR

                  PACCAR Stock                S&P 500
                Annualized Return        Annualized Return
             ----------------------    ----------------------
               Tenure      6-Year             6 Years
             ---------   ----------    ----------------------

                 23%         27%              (1.1)%

"This is wonderful recognition for the company and is a direct reflection on the integrity and dedication of PACCAR's 22,000 employees in providing superior products and services to its customers," said Mark C. Pigott, chairman and chief executive officer. "It is pleasing to be one of only two CEOs in the survey to be recognized as a top 10 leader for the fourth year in a row. PACCAR's record financial results in 2005 and the first quarter 2006, combined with earning the National Medal of Technology, provides an excellent foundation for future growth."

PACCAR is a global technology leader in the design, manufacture and customer support of high-quality light-, medium- and heavy-duty trucks under the Kenworth, Peterbilt and DAF nameplates. It also provides financial services and information technology and distributes truck parts related to its principal business.

PACCAR shares are traded on the Nasdaq Stock Market, symbol PCAR, and its homepage can be found at www.paccar.com.