From this site...
Can Water Really Power a Car?Are there really people out there who fall for this scam and shell out the $49? Sadly, I bet there are. The site counter there claims over 2.5 million hits, so if you figure a conversion rate of 0.01% then the site's owner has grossed over $12,000 for just putting up a web page.
The answer is YES, ABSOLUTELY! We have made the technology to build a water-burning hybrid easy and affordable.
Water can be used to fuel a car when used as a supplement to gasoline. In fact, very little water is needed! only one quart of water provides over 1800 gallons of HHO gas which can literally last for months and significantly increase your vehicle's fuel efficiently, improve emissions quality, and save you money.
Thousands of successful water-conversions around the world are proof that this technology works and will soon catch on! Some industry insiders say its just a matter of time before this water-burning technology will be standard in new automobiles. One expert estimates most cars will be using this technology by 2012, but until the auto manufacturers catch up, you can use this technology for yourself today at a very reasonable set-up cost.
Facebook (where I found this bullshit being advertised) should be ashamed of themselves. Oh, and this is a good example of why I chose to not put Google's Adwords on Die Eigenheit. If I were showing Adwords then undoubtedly this page would be filled with links for similar sham products right now.