I think it would be better to have the car run for 1 to 2 minutes before you drive the car to let it warm up rather than to let it cool down.

I know its a fact that the trucks that are on the road 99% of the time last for ages because they're always warm. they never get the wear and tear on the engine when the engine is cold. The only time they turn them off is to get them serviced. I don't know what the exact figures are, but they are surprising