International marketing information firm J.D. Power and Associates awarded Caterpillar's C-12 clean power engine its highest levels of customer satisfaction, saying that Caterpillar in particular has done an excellent job in meeting the challenge of the new emission standards by creating its own innovative emission technology and that their success is clearly evident in how satisfied customers are with their engines.

Caterpillar's C-12 engine won the award in the "Vocational" category, which includes trucks used in demanding applications such as construction, refuse hauling and utility services. This year's study was based on interviews with 2,529 customers who own two-year-old Class 8 trucks (weighing 33,000 pounds or more). It measures customer satisfaction in four areas of engine performance: engine quality, engine performance, engine cost of ownership and engine warranty.

"The credibility of the J.D. Power and Associates Award is that it is customer-driven, reflecting the feedback and voices of the end-users who rely on Caterpillar's engines," said Jim Parker, Caterpillar vice president with responsibility for the company's Power Systems Marketing Division. "Team Caterpillar's ongoing focus is on delivering enhanced customer value while at the same time meeting the more stringent EPA emissions standards. We are pleased that customers are experiencing the value of this tireless work."

The C-12 utilizes the building blocks of Caterpillar ACERT Technology, which is a long-term solution that reduces emissions at the point of combustion without sacrificing engine performance and reliability. A systems approach to emissions reduction, it relies on advanced technologies in four key areas: improved air management, precision combustion technology, advanced engine electronics and a simple after-treatment process.

"This is an exciting time for Caterpillar as we continue to see strong customer acceptance for our engines powered by ACERT Technology," said Parker. "ACERT Technology remains the solution for future engines. We currently have 100 engines meeting the even tougher 2007 emission regulations in customer hands today. Caterpillar's extensive and industry leading testing will achieve more than 12 million miles on these evaluation units by mid-October."

The Caterpillar C-15 follows the C-12 in the rankings with strong scores across all customer satisfaction factors. The study examined engines in 2004 model year trucks, the second model year impacted by EPA emissions standards enacted in 2002. Caterpillar has submitted certification documents for all 2007-compliant engines and is fully prepared to begin production. Caterpillar is the leading manufacturer and supplier of truck and bus engines in the combined medium- and heavy-duty categories in North America, holding the leading position in engine shipments to vehicle manufacturers since 1999.

For more than 80 years, Caterpillar Inc. has been making progress possible and driving positive and sustainable change on every continent. With 2005 sales and revenues of $36.339 billion, Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. More information is available at www.cattruckengines.com.

SAFE HARBOR
Certain statements in this release relate to future events and expectations and as such constitute forward-looking statements involving known and unknown factors that may cause actual results of Caterpillar Inc. to be different from those expressed or implied in the forward-looking statements. In this context, words such as "expects," "anticipates," "intends," "plans," "believes," "seeks," "will" or other similar words and phrases often identify forward-looking statements made on behalf of Caterpillar. It is important to note that actual results of the company may differ materially from those described or implied in such forward-looking statements based on a number of factors and uncertainties, including, but not limited to, changes in economic conditions, currency exchange rates or political stability; market acceptance of the company's products and services; significant changes in the competitive environment; changes in law, regulations and tax rates; and other general economic, business and financing conditions and factors described in more detail in the company's filings with the Securities and Exchange Commission, including the quarterly report filed on Form 10-Q with the Securities and Exchange Commission on August 2, 2006. We do not undertake to update our forward-looking statements.