Hi: I just got back from a trip to Maine. I drove 2790 miles and used about 149 gallons of diesel and got 18.62 MPG. I have never gotten anywhere near this high of a MPG before. I don't have a trip without HHO for comparison but I think that this is at least a 20-30% increase in MPG.

Index:
@1:33 MPG calculation
@3:12 Hydrogen Generator description.

The vehicle in this video is a truck that I use for work to haul heavy loads and pull heavy trailers (often in excess of 10,000lbs). While a smaller vehicle would certainly use less fuel it does not make economic sense to keep a second vehicle to use on an occasional vacation. We do have a smaller car but for this trip it was not large enough to accommodate five people, two large dogs and baggage

To the folks that claim that I am violating the Laws of Thermodynamics: The source of your confusion is that you are thinking of hydrogen as a supplemental fuel. In this case it is an additive that improves the burn of the diesel fuel. Back in 2008 I set out to disprove some of the extravagant claims made my HHO enthusiasts. So I made a hydrogen generator out of scrap and ran a series of tests. In every test I got a slight improvement in MPH when using HHO (hydrogen).

I made this video in 2008 and it is now 2013. In the configuration that the truck was in at the time I made this video the best long trip MPG this truck got was about 14.5mpg.