The practice of "puffing" or warming up a vehicle in cold weather might seem harmless, but there could be consequences.

For years, warming up a car in sub-zero temperatures on a cold winter morning has been almost like a ritual. Motorists venture out into the chill, turn on the car engine, and step back indoors to warm ...

CLEVELAND — It’s a morning habit we all have during the winter months: we grab our coffee, pull on a coat, start the car and let it idle while we finish getting ready. The goal is to warm it up. A ...