Has anyone here tried converting to propane? I am starting to a little more research because I hear that it has higher octane levels than pump gas, therefore allowing a more lean air fuel ratio. Lean ratio means less fuel per firing equaling better mileage. I have not done much pricing on propane, but I figure i'll poke around the subject hoping somebody can correct me or agree with me. I'm looking for facts, not opinions, but if you have to, I guess everyone is entitled to them