[USFRIENDINVICTORIA]

"... although those cheap Japanese cars such as Toyotas need to be plugged in so they will start."

Where I used to live, those are balmy temperatures. Use synthetic oil in the crankcase -- you'll have no problems starting to about -40. Provided your battery works, of course. If the battery is not fully charged, it will freeze -- causing internal short circuits in the battery.

[RightWhale]

I think we hit 51 below last month. Not at all unusual, but even my old Dodge had to be plugged in below 30 below or it wouldn't start. That Toyota is useless below zero if it isn't plugged in. It's a rough ride below 20 below, too. It's not really an Arctic kind of car.