There was quite a write up in the home town paper about this guy that installed a home made hydrogen fuel cell in his car. he says it works on both gas and diesel engines. Mileage jump from 32 to 55 miles per gallon. Hard to beleave?? the paper also gave an web site address, to get more infoe about it. To good to be true!! the web site is www.water4gas just passing it along 'Bucky"