I've been hearing about these systems that use hydrogen added to the intake systems of cars resulting in mileage gains of 20-30 percent. My engineering background tells me that this can't be the case (as you can't get "something for nothing"), but the latest spin that I've seen on the Web is that small amounts of added hydrogen somehow enhance the combustion of regular gasoline, so that a small "hydrogen generator" unit is sufficient. There's even a guy at our company (still hearsay) that claims to have increased the mileage of his Civic by 10MPG. I think this is very unlikely (if not impossible), but maybe your crew could debunk the myth, or find that there's some merit there.
So how about it? Do any of you have any experience with hydrogen injection or can explain how it could improve mileage? For that fact, have any of you ever used any gadget advertised to increase gas mileage that actually worked as claimed?