SAN RAMON, CALIF.— Chevron announced today that after 39 years of service James (Jim) McGeehan, consulting scientist for Delo Heavy Duty Engine Oils is retiring as of June 30, 2015.

McGeehan began his career with Chevron back in 1976 as a research engineer. He served as the global manager of diesel engine oil technology and was also responsible for all global heavy-duty engine oil development during his tenure.

“I would like to thank Jim for his dedication, passion and many contributions and mentorship to our company, personnel and industry over the past four decades.  He has been a leader in our Lubricants Formulating Team and has set a high standard for all of us to follow into the future” said Brian Stripling, general manager brand, Technology & Original Equipment Manufacturer (OEM), Chevron Products Company.

McGeehan was a member of the Institution of Mechanical Engineers in the UK since 1971, was appointed a SAE Fellow in 1989 and a Chevron Fellow in 2002. In the last two decades, he has trained Chevron marketers and new employees on benefits of Delo 400 technology.

“Jim’s passion and visionary outlook for developing Chevron Heavy Duty Engine oils was key to elevating Chevron’s Delo Brand to a top tier category performer over the years and we are indebted to his efforts in developing Delo’s superb reputation,” said Leonard J. Badal, Jr, Chevron’s global commercial brands manager.

McGeehan will be replaced by Shawn Whitacre, senior staff engineer, technology. He has worked for nearly 20 years on research and engineering dealing with heavy-duty engine lubricants, fuels, and materials. Before he joined the Chevron team, Whitacre spent 12 years leading global fluids and materials engineering activities for Cummins.