Ummm - I have not used it, but it sounds like complete B.S. to me. 'Negatively charges your fuel'? Please. The whole engine block is nothing but a large ground, so guess what? There goes that idea. I'm also sure that gasoline is not designed to act as any type of electrical capacitor, so the chances of it holding any charge, positive or negative, seem a bit unrealistic.
It states the it makes the gas molecules smaller as well on their site. How is this even possible?
I think that the only thing this product cleans out is your wallet.
E