We've all heard the advice that you should let your car warm up on cold winter mornings because it will run better.

 But is that really true?

The car experts at the American Automobile Association say it isn't. Triple A says you should start your car and let it idle just long enough to put on your seatbelt. This ensures that the motor oil gets to all of the engines vital parts and lubricates them adequately. Driving the car normally and avoiding hard acceleration warms the engine faster and also reduces wear and exhaust emissions. However, a little longer idle time is perfectly fine while clearing ice and snow from your car.