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Old 09-09-2009
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roline roline is offline
Cal 9.2 SilverSwan
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fuel consumption

I've always used 18 HP per hr per gallon for diesel and 14.5 for unleaded gas. This assumes internal combustion engines, 4 stroke, normally aspirated. I did some research on small engine fuel consumption and it goes like this:
Diesel17-20 hp-hr/gal

Natural gas9-11 hp-hr/ccf

LP (propane)9-11 hp-hr/gal

Gasoline10-14 hp-hr/gal

The size of the engine, operating temperature, RPM, and Load all have an effect on the efficiency of energy conversion.
Cal 9.2 #19 SilverSwan

Last edited by roline; 09-09-2009 at 09:11 PM. Reason: add graph and more info
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