Also called white gas or camping fuel, you can't beat it for camping in the winter or at high altitude. Burns hot even at subzero temperatures. And unlike butane and propane, output doesn't falter as temperatures drop. Coleman Fuel is very refined, and burns hotter and cleaner than other liquid fuels. It's relatively inexpensive and not difficult to come by. By carrying the fuel in small refillable fuel bottles, you don't have the disposal considerations you do with empty propane or butane cylinders. But unlike appliances that use those fuels, you do need to fill liquid-fuel appliances. And for steady output, they need to be pumped occasionally to maintain pressure within the fuel tank.