Quote Originally Posted by Robinhood4x4
I've got a friend who retrofitted his new tacoma with a hydrogen system. It uses the electrical system of the truck to extract the hydrogen from water and then it injects it into the intake. I guess they sell these kits on the internet or something. He claims he's getting 20% better mileage, but I'm skeptical.
Does this have something to do with the water4gas thing?

Check this out at the National Renewable Energy Lab. This link gives a thorough discussion of new technology they are playing with to produce Hydrogen from means other than hydrocarbons:
http://www.nrel.gov/hydrogen/proj_pr..._delivery.html