Most places where your car sits for a long time (work, home) have 110V outlets to power the various heaters. Most stores and other quick stops don't. A lot of people leave their cars running to keep the engine and the passenger compartment warm. This is the only place I've been where people also keep the car running while fueling up at the pump.
Heated garages are pretty common up here, but my house only has a single car garage. I usually squeeze my diesel F350 in there for the winter while my LC and Expedition suck it up outside. Honestly, it just seems like it would be bad for any car to go from a +50-60F garage to -40F instantaneously each morning. All of the different metals, plastics, etc. expand and behave differently in cold temps...a sudden temp shock seems like it could make things worse. Just my opinion though.
Heated garages are pretty common up here, but my house only has a single car garage. I usually squeeze my diesel F350 in there for the winter while my LC and Expedition suck it up outside. Honestly, it just seems like it would be bad for any car to go from a +50-60F garage to -40F instantaneously each morning. All of the different metals, plastics, etc. expand and behave differently in cold temps...a sudden temp shock seems like it could make things worse. Just my opinion though.