do turbochargers increase gas mileage
Trending Now. Answers. Best Answer: Well, no, because a TURBOCHARGER uses the engine's exhaust to power itself. Now, yes, they're right about how you'll be tempted to use it and that will decrease gas mileage. However, a SUPERCHARGER, can (in small cars) acutally increase gas mileage (because of a weight:power thing). However, putting on a SUPERCHARGER can actually decrease the life of the engine and transmission (the tranny beacuse it may not be able to handle the additional torque)