Dennis Bachelder
Dennis Bachelder is a senior engineer in the Engine Oil Licensing and Certification System (EOLCS) at the American Petroleum Institute (API), currently working to maintain the API 1509 Engine Oil Standard and progress the development of new passenger car and heavy duty engine oil standards. His background includes lubricant development and evaluation, engine testing, additive package development and lubricant product line management.

Bachelder has worked for engine manufacturers to set lubricant standards at General Electric, Continental Motors, and Fairbanks/SEMT Pielstick. He has helped develop engine tests to evaluate performance of engine oils for gasoline and diesel fueled engines.