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Originally Posted by TheEnemy
You would adjust the engine efficiency for the range you would be running the engine in.
A larger engine would be less efficient at the same power load as a smaller engine.
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Okay, so how does one go about estimating the efficiencies of different engines?
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Add to that no two engines are the same even if they are the same displacement, year, options...etc.
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It's an estimator, so that seems like splitting hairs.
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The point being, I can't find the MPG estimator I used the other day.