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A good rule of thumb is that 1/3 of fuel burned goes to turn the crankshaft, 1/3 as heat to the radiator, and 1/3 as heat out the exhaust. This would apply to an automobile engine running near its best efficiency point.
Sample calculation:
Assume your engine burns 10 GPH at WOT.
Assume gasoline is 120,000 BTU per gallon. That sounds about right, I'm too lazy to look it up.
Then heat to radiator is 1/3 X 10 X 120,000 = 400,000 BTUH.
A large diesel engine can convert as much as 50% of the fuel into power.
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06 Canyon: The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
22 Maverick: Summer 2022 burned 62.74 gallons in 3145.1 miles for 50.1 MPG. Winter 2023-2024 - 2416.7 miles, 58.66 gallons for 41 MPG.
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