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Hello Some of you might have seen the commercials regarding installing an HHO ( water-hydrogen ) system in your car that can make it use less gazoline/diesel so you can drive further. Example..: http://www.oktanplus.com/hho-en Well my question is... Is HHO system Real or a scam ? - about 7 years ago i installed such a system in my "toyota aygo" with mixed results. First of all when the system run the car have to generate more electricity to send electricity though the water that then split into Hydrogen and Oxygen. What I try to say is when something use more power in the car it also use more energy, so I wonder a bit if the Hydrogen compensate for this and add more power than the car uses to produce it. Well my own experience is that HHO is not good for short distance traveling since it take a while to generate enough HHO ( at least in the system i had ) and I rarely drive long trips, so at some point i uninstall everything and that was it. A few times I tried to mesure how far I can run the car, and as standard with system off the car drive like 22km pr lite gazoline. But if i remember correclty I could make it run like 32km pr lite gazoline with the system on, when it was working. I do however think a bit about if I made mistakes back then and if I really saw any improvement at all. Well I ask since I might try HHO again in the future, but would like to know more about if this is actual a waste of money or if will help my car. ;-) Thank you for answer and debate below in advance.