I'd say ethonal being a cleaner fuel will work.Back here in Moonshine days cars ran on moonshine.Thats how Nascar was born.
Its also like the guys who run wvo for inspection and their diesels pass in flying colors.One more trick is to add 4oz. acetone to every 10 gals gas and diesel.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt