For those who must travel in winter with the possibility of being stranded, add a auxiliary heater to your vehicle. Webasto and Eberspacher both produce air and coolant heaters for gas and diesel fueled vehicles. I have a Webasto coolant heater. These types of heaters are very fuel efficient and also preheat your vehicle to enhance starting, pri-warming the interior, and melt ice on the windshield. These are the same heaters used on large trucks and boats. These heaters are common up north.

With these type heaters your fuel will last much longer and allows easier starting when recharging your vehicles batteries. The only precaution is to keep the inlet and exhaust clear to the heater.

For those who cannot self install, the price is less than $2000 for most cars and trucks