How does the number of pistons in an engine effect gas mileage?

Answer 1

well the amount of cylinders in the engine will usually mean the size of the engine, and when the engine is bigger it usually means that you potentially get worse MPG unless talking about a mix of a gas engine and some sort of hybrid motor and your MPG may very depending on how you drive and if your driving in the city or on the highway as the highway you will get better MPG because you are not always stopping and going