GM Powertrain has built all of its industrial engines so they can be fueled with propane or natural gas. Propane and natural gas have higher octane ratings than gasoline, but they also have lower lubricity, so engines must be designed specifically to handle the increased frictions associated with these fuels.

Vortec 1600 - A very efficient engine that offers proven performance in a compact package. It is a global engine used in a multitude of applications. This is the smallest engine that GM Powertrain has supplied in more than a decade.

Vortec 2400 - A 4 cylinder engine that gives industrial OEMs another choice in selecting an engine that exactly meets their requirements. This is a new, larger, more powerful version of the proven Vortec 1600 engine.

Vortec 4300 - A mid-sized V-6 with advanced technology and a proven history of reliability. The V-6 engine features overall size and weight advantages with superior power-to-weight ratios.

Vortec 5700 - The power and character to the legendary GM small block available in an industrial engine. The V-8 engine delivers excellent performance and durability for a variety of applications.

Web Site: http://www.gm.com