That's assuming you can get into your car. I've had a few mornings lately with temps around +3 F and doors that would not open on my F-150. I deiced the windshield before trying to drive my son to work. That lasted about 200 yards into a 2.5 mile trip. The deicing windshield washer fluid froze instantly on the windshield. A bottle of spray-on decing fluid worked well enough to continue the trip. The other unpleasant part of the trip was a frozen throttle cable. The truck backed out of the driveway just fine in reverse with the engine idling. I put in in drive and the gas pedal wouldn't move. I had to stand on it to get it to move at all.
We're having a heat wave this afternoon. The temperature is all the way up to +10 F. It is supposed to drop to -6 F this evening.
After a few eight month winters dealing with -20 to zero most of the time, most people get into a routine with their vehicles so they are somewhat reliable. The Ford F150s do okay although the Chevy/GMC, Toyota, and Dodge pickups are good. The trick with the windshield is to not use the heater once you are on the road. Did I mention that aluminum alloy wheels could be a problem at -40?
What?? You don’t have an engine block heater??