[Red_October_7000]

This thing unfortunately isn't "it". You can't win by cracking water for hydrogen and then burning that hydrogen in the same engine that's producing the electricity that cracks the water for the hydrogen in the first place. You actually lose a little by doing that because the system is imperfect. It's a shame these don't work, but they don't. If there was a $1200 device you could put in your car and increase its fuel mileage by 60%, the automakers would equip them standard because CAFE ratings are choking them to death. The easy steps you can take aren't done for other reasons -lower restriction exhaust makes the cars noisy, high effieciency air cleaners need to be loaded with messy oil every year and add $30-100 cost for a fractional MPG return (seeing "big" numbers like 1 or 2 usually comes when you toss a nasty old paper air cleaner for a brand new oil loaded one). Other than those two things, and the exhaust isn't "easy", there is little you can do to increase MPG by a lot.

There IS, however, a $4,000 device you can equip on your truck right from the factory that increases its mileage by %60... it's called a Diesel!