We don't really get cold enough weather around here to require to warm up the car. But also, my car is usually in the garage overnight so there's really no need.
On a few occasions I've left the car out in the driveway over a winters night and I've let it idle for a minute but never really need to warm it up more than that.
On a few occasions I've left the car out in the driveway over a winters night and I've let it idle for a minute but never really need to warm it up more than that.