Today’s vehicles are designed to maximize fuel economy in numerous ways. One such feature is the automatic start/stop function that shuts off the engine when your car is idling and restarts it ...

The E.P.A. under Trump is moving to eliminate credits to carmakers for the fuel-saving start-stop function.

The automatic start/stop function shuts off the engine when your car is idling. But just how much does this technology really save you on gas?