Pizzaguy - Thanks for the response. I thought there was an additive, the name escapes me, that was called an enzyme additive and was made just to treat alcohol impregnated fuels. I usually run Shell 93 octane fuel but sometimes it is not where I am driving. I don't know if that is what you are calling 100% gasoline or not. It seems like all gasoline is now with some amount of alcohol. If I'm wrong, please correct me because I want to know. How about Exxon and BP? Are they pure? Where I live there seems to be a Speedway every two or three miles apart. I don't know anything about their fuels.

Thanks

Jim