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Is there a general graph or curve plotting MPG at different speeds?

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Answered 2006-03-11 15:58:55

There very well may be but it would only apply to the particular vehicle it was written for. There is no general graph. Many factors determine MPG. Weight, engine size, aerodynamics, terrain, city or highway, just to name a few. Yes, there is a bell curve which depending on your transmission (number of gears, gear ration etc), tops off usually at about 45 mph. You will get the best mileage at the lowest rpm in the highest gear.

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