This! I’ve boosted cars in -30 and it takes a bit of extra crank because the fluids are all thick in the cold. But it works. It’s not a bad idea in really cold weather (-40) to start your car every 4 hours or so to keep it warm.
Edit: the gas cars failing to start are almost always having old batteries that need replacing. In a really cold climate you don’t want to push 7 beyond years. Some batteries are in rough shape after 5.
Edit: the gas cars failing to start are almost always having old batteries that need replacing. In a really cold climate you don’t want to push 7 beyond years. Some batteries are in rough shape after 5.