People are claiming to increase mpg by running hydrogen through their car engines via electrolysis. Directions, for $97, also state (I am told) how to bypass MAP sensor on air intake so the car accepts the hydrogen without causing the computer to freak, how to adjust the number of amps your distilled-water (with baking-soda) will draw and so on. I saw a few cars with this system but I remain skeptical (Saturdays 12-1 at Apollo XI Modle air plane field, Van Nuyes, CA - a cop was needed for crowd controll). One of the guys these was on 550 radio stations a few days ago explaining his system. I'm all against foreign oil, but someone with a degree in engineering need to check this guy. There's even a website of a guy in the philippines running his Buick 100% on hydrogen using this method.