planepounder: I wish you was not such a kill-joy. Hamaoki is experimenting and that is how advances takes place. Keeping the spent oil out of the air is not a bad idea either. I took a 4 cycle .65 Saito and hooked a 2 oz tank to the crankcase overflow. You would be suprized how much oil accumilated in that tank. That is oil that would normally go all over your plane or in the air. Seems like the words "re-invent the wheel" and "chasing your tail" was used by you before on RCU. I think its a great idea to be able to use any fuel without the need to mix oil in the fuel. Capt,n