I have used denatured alcohol in my Zippo when i ran out of fluid at work. It evaporated pretty quickly but I made it through the rest of the day until i made it to the store to buy some more fluid.

I had read somewhere that diesel fuel would work in a Zippo but unfortunately it DOES NOT WORK. I had to take all the cotton out of the Zippo and replace it to get the stink of diesel out of it. I am pretty sure I replaced the wick on it too just to get it to light and stay lit.

I will be getting me a couple of these peanut lighters in the next week or so i hope. I like new ways to make fire. (especially to light my Camels)