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You are correct, the 15% is meant to denature the PGA, otherwise it is illegal to possess. As far as using Ethanol goes, in the long run its a much better option, eventhough we are currently using crops to make it in most regions we need to remember a few things - 1.) This IS a renewable...

Indeed, as that is exactly what E85 is, Pure Grain Alcohol (with a bittering agent) and Gasoline.

just to be a bit clearer, the 85% is moonshine, you would still need to mix 15% gasoline to make it a true e85 fuel.

All flex fuel is, is moonshine, and being from Tennessee, it certainly isn't hard to learn how to make it. All sorts of homebrew kits out there, once you get it all built you can easily make this for under $2 a gallon.

ah, well I'm actually working on building a still with a work buddy of mine and using flex fuel in all of our vehicles, estimates would put our 85 - 15 mixture at somewhere near $1.40 a gallon. That's the reason i'm seriously considering it.

Hi, hate to make my first post a hijack one, but I was wondering if anyone had done the conversion to e85 and how'd they go about it? I have an 04 Yukon and sadly the 8th character of the vin isn't a "z" so its not setup for it. As I understand it the 5.3 Vortec is the same, the fuel lines...