Propane Systems for Vehicles

Propane (autogas) is a cleaner, higher-octane fuel. That means fewer oil changes and longer engine life for your vehicles. The Stanford LP Gas Motor Fuel Division offers options for two types of engine conversion systems: diesel to propane and gasoline to propane.



Diesel to Propane

With the Diesel Optimizing System (DOS), propane (autogas) is metered into the air intake stream based on the engine load. The horsepower and torque of a diesel engine can be improved by adding a metered amount of propane vapor to the air inlet charge.

In addition to the power increase, overall fuel economy can be improved. This is accomplished by monitoring turbo boost pressure (engine load) and metering vapor into the engine, which supports more complete burning of the diesel fuel.


  • Reduced operating cost per mile
  • Improved power and torque
  • Reduced tailpipe emissions
  • Reduced engine maintenance costs

Gasoline to Propane

We offer three types of gasoline-to-propane conversion systems:  Technocarb and ICOM.








Technocarb Alternative Fuel Power

Technocarb-LogoTechnocarb is a manufacturer of Liquid Propane Gas (LPG) and Compressed Natural Gas (CNG) conversion systems for gasoline and diesel powered automobiles, trucks and industrial equipment.


ICOM North America

icom-logoThe ICOM JTG Propane System can be utilized in either bi-fuel or mono-fuel applications, and can be used on any multi-point injection gasoline vehicle.



Check out our video on propane conversions--------



For information or questions on propane engine conversions contact us at:





Main Office

3611 N. Eastman Road
Midland, MI  48642
 8 a.m.-4:30 p.m. M-F

Email Us | Map 

Gladwin Office

1420 W. M-61
Gladwin, MI 48624
Ph: 989-426-5000
Fax: 989-426-2926
Hours: 8 a.m.-4:30 p.m. M-F 

Email Us | Map

Meet the Director

Gary Shepherd, director of the Stanford LP Gas Motor Fuel Division, has been developing alternative fuel systems for more than 16 years. He has worked with General Motors, Ford, Chrysler Canada, Detroit Diesel and Cummins Engines on their respective engine systems using clean-burning propane.

He assisted Freightliner Custom Chassis in design and specifications for its propane-powered transit busses, which are built at its plant in Gaffney, S.C. He has designed various OEM-approved propane fuel systems for Freightliner transit busses. New propane chassis are shipped to Midland, MI, where Gary resides, for the propane system installation. They are then shipped on to the body builder for completion.

Gary has worked with several colleges and universities in writing curriculum for proper training and installation of propane fuel systems. He is a member of the National Propane Gas Association, an advisor on fuel systems to the Propane Education and Research Council, chairman of the Engine Fuel Committee, and past president of the Michigan Propane Gas Association.

Our Pledge


At Stanford LP Gas, we feel our responsibility to our Family of Customers goes beyond just selling you fuel. We operate today on the same time-honored traditions of my father by providing excellent customer service, competitive pricing and peace of mind.


Our Customer Bill of Rights is just one way we work toward fulfilling our responsibility to our customers.

Thank you for considering Stanford LP Gas.

Duane Stanford, CEO