Classic/Antique Car Repair/Multi-fuel engines


I've read about earlier trucks using multi-fuel engine, meaning it could use either diesel, gasoline and kerosene for fuel, e.g. Bedford trucks (UK) during the 1960. How is this possible?

Nowadays we have liquid natural gas used in diesel trucks. Again how does this work?


Hello Yahaya,

As you note, multifuel engines have been around since before the 1960's, particularly in vehicles intended for military use. All use a combination of variable ignition timing and fuel pre-heaters to help atomize fuels of differing volitility. Of course, multi-fuel does not necessarily mean running well or at maximum engine potential horsepower, it just means it will run on whatever, given a pinch. Research the subject and you may be surprised which fuels produce the most horsepower. Hint: it's not gasoline or diesel.

For a detailed discussion of theory of operation, various fuel efficiencies and practical considerations, Google alternative fuel military engines as well as modern, natural gas  multifuel conversions. You will find more than enough information to answer your questions.

Good luck,


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Robert Russell


Mechanical, Body, Historical, MOPAR, GM, Ford, Packard, 1930-1975


Former Chrysler Tech., Project Manager for Antique and Classic Car Dealership. Owner/Driver of Classic Cars Since 1972

AACA, North GA Mopar Club, Packards International, W.P. Chrysler Club

High School Auto Shop plus Adult Night School

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