Coleman lantern fuel is essentially ethanol free, lead free gasoline. If it is available where you are, you can look at it as gasoline without all of the additives. It is also possible to "wash out" the ethanol. It is more soluble in water than in gasoline. Add water, agitate, and then allow the water/ethanol solution to settle to the bottom and skim off the now ethanol free (or at least reduced ethanol) gas. Your mileage may vary and test before flying.