I've been cold. Really cold. I'm talking -45°C, alone with my truck Matilda, somewhere you'd rather not be without a working heater. At that temperature, breathing in through your nose hurts. Your petrol generator won't start. And if your diesel heater goes down, you're in serious trouble. If you dream of pushing into genuinely extreme environments, whether that's Scandinavia in deep winter, Siberia, or the Gobi Desert, this is the piece of knowledge that could make the diffe