Snake, what are you trying to end up with here ? A truck that will run on either gasoline or ethanol ?, or a truck that runs on just ethanol ( I'll presume you're looking at E85 ? ). Changed your truck to flex fuel staus would be tough. Changing over to E85 only, on the other hand is much easier, but if the engine were optimized to used E85, then using regular gasoline is no longer an option. DF, @ his Dad's house Dern, thats only partially true. Flex fuel cars use more when running on ethanol, but dedicated ethanol engines do not.