[Jonty30]

That and performance issues when it is -40C and you’re stuck on a highway for a couple of hours.

[Gay State Conservative]

A few years ago (in January) I drove my diesel sedan to Val d'Or,Quebec and spent the night. When I arrived at 6PM it was about -20F (according to my car's dashboard). When I was ready to leave at 7AM the next morning it was -40C (according to the TV set in the lobby) and -40F according to my car's dashboard.

To my shock and amazement my car started and after letting it idle for a few minutes I drove off,heading to Montreal. For the first 50 miles or so the car felt like a tank.