>So Dr. Yul Brown is wrong? :o)

Yes.

>Purdue University is studying it right now.

Must be government-funded ;-)

>The only real possibility that I know of using hydrogen at all is the Hydrogen fuel cell which has been in production since the 1966 GM Electrovan.

Hydrogen fuel cells have real theoretical possibilities - uses hydrogen produced by electricity as fuel, then "burns" that more efficiently than an IC engine. So, the entire energy cycle for hydrogen fuel cells is theoretically better than IC engines. They have been used in spacecraft, stationary power generation purposes and some mobile uses such as forklifts and IIRC locomotives.

But, practical application for automotive use is elusive. Here in BC we are world leaders in the technology. However, Ballard and various partners have gone through a huge amount of investment with little to show for it. The main problems for automotive use are on-board storage of hydrogen fuel - current state-of-the-art is 450 to 700 bar pressurized tank storage (that's 7,000 to 10,000 psi - serious business), refueling infrastructure for that kind of pressure, and making fuel cells robust and cheap enough for auto use.

>
>>>Today I saw an add for a conversion kit for cars to enable cars to run on H20. The conversion kit was around 300.00 - hard to imagine that 300.00 could change your car to run on water! Of course, that might be a problem in the desert or during a drought...
>>
>>The auto industry is plagued by overcapacity, and makers are looking for any tiny edge to help sell their product. If these "water conversion kits" worked at all the big makers would fall all over themselves rushing the concept to market. A $100 kit (retail, mass production cost a fraction of that) would be way cheaper than $1000s in "incentives". And reducing dependence on foreign oil - patriotic too!
>>
>>The only reasonable conclusion even non-engineers can reach is that these "kits" are bogus.