I would be cautious about using any liquid fuel that will burn without benefit of a wick. Wax would be pretty safe. Minor spills of alcohol and most oils are usually pretty easy to put out. Gasoline would be much more problematic. A fire running you out of your vehicle in the middle of a blizzard would be a major setback. And that assumes everyone gets out unburned and all the survival gear gets out with them.

Finding yourself standing outside in a snowstorm, seriously burned, watching your vehicle, much of your exterior winter-wear, and all of your survival gear burn would be a major setback.