Quote Originally Posted by kraven251 View Post
I also carry a set of tea-light candles. They don't take up much space and will generate enough heat to keep you alive in a car even if it drops to -40. It is always nice to be warmer, but the minimums will keep you going especially when you are tight on space.
Have you ever tried this? I made a four wick candle once and would light it and sit in my car when it was -10 degrees. It may be true that it would generate enough heat to keep you alive, but I don't think I'd use the term "warmer." At -10 below, I couldn't feel any heat from the candle until I was close enough to burn myself. So it's a good idea for life, but don't be under the impression that it will make the vehicle any were near "warm."