Go ahead and tip the Nitro jug I love the smell of burning Nitro and the noise!
You can use methanol alcohol but it will need a major rejetting and special oil for the mix(castor oil or syn.) and they ain't cheap and your mileage will go down the toilet an alcohol is very rough on the aluminum parts the stuff likes munch on the aliminum and rough on seals.
Cooking oil? Kerosine? all cost more per gallon than gas at least where I live but if you've gotta try it. I'd like to hear the results I could be wrong and it wouldn't be the first time.
Norman