Yeah, a buddy of mine has a buggy on propane and his oil is perfectly clear after 17,000 miles, not one oil change... He cuts his filters open and it was perfectly clean as well. Propane has none of the by products of gas like carbon buildup. Also has a higher octane raiting, 103, which means you can run a higher compression, something I'm doing in my buggies engine. I don't see any reason not to go to Propane, even get full service at the gas station :anitoof: