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International Automotive Technicians Network
Re: Fuel economy/miles per gallon relative to mass airflow
Posted to Technical Theory Forum on 1/6/2019

It takes a given amount of power at the driving wheels to propel a given vehicle at a given speed. This is regardless of gear ratio.

Having said that, changing to a different gear may put the engine at a more efficient RPM, so the engine may have to consume ... Login to read more.