I have heard about people who are building hydrogen injection kits for cars that inject hydrogen into your intake manifold. They are all promising a 25% to 50% increase in gas mileage with these systems. Has anybody here tried this? What kind of long term affects can I expect one of these kits to have on my engine?

I have been looking around on how to make your hydrogen+O injection system for a car. I know a mechanic that will do it I just can’t find a decent tutorial anybody help? I already read the whole water4fuel thing and I think it sucks too out there over half of it does not even talk abotu how to do it all it says is buy our kit here…
Are you shure? Wikipedia says it’s real =) there are plenty of people who say it works.
Nomadd the hydrogen and oxygen are already in the water it only uses 1-3 volts to seperate it!