You no longer need to warm up your car in winter — for your car’s sake — unless it’s old enough to have a carburetor, or it’s electric or a plug-in hybrid.

Hot weather improves fuel economy because it helps the engine warm up more quickly, and hot air creates less drag. Summer ...

Up until the 1980s, Carfax said vehicles had carburetors, a component that regulates the mix of air and fuel in the engine. At the time, warming the car in the winter made sense since it could ...

In the thick of winter, common wisdom advises that you step outside, start up your car's engine, and let it idle to warm up before leaving. But contrary to popular belief, this does not actually ...