This is crap. It is not a net-power generator. You actually CONSUME power in the seperation of the hydrogen and oxygen, even using Magical ‘Electricity’.
http://stevenwandrews.newsvine.com/_news/2006/06/10/250735-water-car-inventor-murdered
http://www.metacafe.com/watch/1395288/japanese_invent_car_that_runs_on_water/