Loads of websites offer to teach you the secret of how to run your engine on water, mostly for a fee. For example Water4Gas.com say, on there enormously long and infomercial-like web page, you can halve your mileage and boost your performance by running your car on water. Sound like bullshit to you?
This “technology” is not to be confused with hydrogen powered cars or hydrogen fuel cells, this is a form of the water-powered-car myth; see the links at bottom of this article.

The theory
The theory goes something like this; electricity from the engine’s battery is used to separate the water into its components, oxygen and hydrogen, which are then burnt in your engine, sometimes along with the fuel it was running on in the first place but also displacing some of it, so you use less fuel and get better mileage.
Thermodynamics
Even if it did work, and it does not, the thing is it takes a lot more energy to separate the oxygen and hydrogen than there is energy available in it, and the energy is coming from your engine which means it is coming from your fuel, so you use more energy creating your miracle fuel than there is available to gain from it.
To put it another way, if the device operated as claimed the combustion cycle would start and end in the same state (starting with water and ending with water) while extracting usable energy, thereby violating the first law of thermodynamics, a perpetual motion machine.
Stanley Meyer
It all comes from a guy called Stanley Meyer who’s invention in the 1990s was claimed to use high frequency pulses of electricity to separate the water into its component parts. His claims about his Water Fuel Cell and the car that it powered were found to be fraudulent by an Ohio court in 1996, there is no evidence that any of these devices operate as claimed, and he was forced to refund his investors.
Here is another example of this nonsense, www.waterforfuel.com (this guy even has an eBay shop selling this rubbish).
If you still want to try it:
If you still want to try it then don’t pay for the information, it is all freely available on line here: waterpoweredcar.com/stan.html.
Firther reading:
Although all Wikipedia entries, and therefore of dubious reliability, these happen to all be of excellent quality and well cited:
Water fuelled car http://en.wikipedia.org/wiki/Water_fuelled_car
Hydrogen powered vehicles http://en.wikipedia.org/wiki/Hydrogen_car
MagnoFuel
Apparently they also kill all sorts of nasty dangerous organisms which I did not know where in my clothes; frankly after reading the list of nasties in my wash-basket it is amazing that I am alive at all, for not using either detergent or Eco Balls, just forty-degree water.
Ecotopia, not the fine people who
At face value the Facebook Forest seems a worthy enough cause, does it not, or at worst a fairly benign, albeit cynical, marketing exercise? However, they came in for a lot of hard questioning and criticism on the Facebook site (at least in part from me, but from many others too) which they chose to edit and delete rather than publicly respond to. Sure some of people were out-and-out nasty but others, such as myself, were not; we asked fair questions and Ecotopia deleted them. Funnily enough this annoyed people and they posted their outrage on the Facebook Forest site, resulting in further deletion until eventually Ecotopia withdrew the facility to post messages to their page entirely.






Apparently the 60-year-old electrician and inventor, who does not own a television (so what? nor do I) and has never lived in a house with electricity (??), has invented a micro hydro power station which can power a house from a stream with only 8 inches of head. This has been reported as some how miraculous and how he has solved a century’s old problem in building a micro hydro (there is nothing new about micro-hydro schemes). What actually is miraculous is the idea that one can run a house from a stream with only 8 inches of head (seems he has solved the problem of how to break the laws of physics), this is risible nonsense; by my calculations that is 1.7 cubic meters of water per second for a mere 2kW load (an conservative 







