I’m glad I put a block heater in my car this summer...
I lived in the far north for decades & I had a block heater, oil pan heater, electric battery blanket and interior warmer. When I moved to Victoria, people would ask me about the plugs sticking out from the grill of my SUV — they thought it was an electric vehicle.
As long as you're running a cord out there.......Consider adding an electric heating blanket too. They can be purchased on ebay for not much money, and install easily.
The difference of a warm battery is amazing.