In some areas, it is illegal to leave your car running with the key in it unattended. Are you breaking the law?

Puffing sounds harmless, but leaving your car running unattended can carry legal and safety risks that vary widely across the United States.

Cold winter mornings often prompt drivers to start their cars and let them idle before driving. This practice stems from decades-old advice that once made perfect sense for older vehicles with ...

(KTVX) – With morning temperatures continuing to drop in large swathes of the U.S., braving the walk out to the street to start the car and head to work may have already started to become dreadful.

Add Yahoo as a preferred source to see more of our stories on Google. That old habit of letting your car idle for five or ten minutes in the driveway on a cold morning feels caring, but modern engines ...