...does anyone have any really constructive replies to put me out of my ignorance and misery.
Hydrogen activation
The strength of the carbon-hydrogen covalent bond in methane is among the strongest in all hydrocarbons, and thus its use as a chemical feedstock is limited. Despite the high activation barrier for breaking the C–H bond, CH4 is still the principal starting material for manufacture of hydrogen in steam reforming. The search for catalysts which can facilitate C–H bond activation in methane and other low alkanes is an area of research with considerable industrial significance.
I haven't studied these machines but as it states that they run off the cars electrical system and that there is a 'Fuel' saving, I am assuming they use the petrol/diesel engine to drive a larger alternator than the vehicle was originally supplied with and then use this alternator to electolysise water and use the resulting Hydrogen to fuel the engine. Quite how it can produce enough Hydrogen to do this is a little puzzling, but that how I assume it works. May be worth chatting to the manufacturers about their claims. Seems a bit far fetched to me but maybe the guy has something.What about about these cells http://www.myhydrogen.co.uk/ do they work?
Heard about 8 years ago that BG where developing some sort of power source that gave out more energy than was put in but not heard mention of it for a while