Quote Originally Posted by TLSheff View Post
A friend of mine saw a video of a car in England... used one of these to almost double his fuel efficiency and said there was noticeable power improvement (according to the butt dyno anyways).
My friend showed me the video and the setup, said I should do it to mine... I just laughed. It puts hydrogen vapors thru the throttle body and into the engine, to increase combustion and burn cleaner there by saving fuel or something along those lines... I told him I think Ill stick with mods that I know work, rather than adding stuff that is theoretical. Besides 30mpg on the highway is enough to make me happy
It only works on certain motors, and needs a Bubbler (take vapor out of the gas) and this one didnt have it.

The last car i had it on actually went up 20% fuel milage, but sometimes its not worth the trouble or expense.