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Old 01-29-2003
jklewissf jklewissf is offline
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fuel consumption gas vs diesel

A couple of weeks ago there was a message string going about gas versus diesel engines and I was challenged when I made the comment that you get more hours of operation out of a gallon of diesel.

I just stumbled across the following on a web site called boatsafe.com.

How much do gasoline and diesel engines consume?

Diesel engines consume about 1 gallon per hour for every 18 hp used. You can estimate the number of gallons consumed per hour by multiplying horsepower used by 0.055.

Note: An engine at cruising speed usually uses only about two-thirds of its maximum available horsepower. Most marine engines are designed to run continuously at between 60 and 75 percent of maximum speed. Diesels tend to be more toward the top of the range.

Gasoline four stroke inboard engines need about 1 gallon per hour for every 10 hp used. The number of gallons consumed per hour can be estimated by multiplying horsepower used by 0.100. (see note above)
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