I worked an 11 hour shift today, and when I clocked out tonight it was -32 degrees. My Challenger was parked outside the entire day, but I did start it twice and let it run for a few minutes. The only issue was that when I left, all of my tires had lost air pressure. Three are nitrogen and one is regular air as I ran over a nail last summer. All things considered, the car held up quite well to pretty extreme weather.