I have seen a couple of these devices and I can say with certainty they are utter bullshit. There was a lot of interest in the GEET engine from some prominent steemians a few months ago. Someone even went to NH to hang out with a guy claiming he had built such an engine, he hadn't. It is possible to split water into hydrogen with electrolysis but it takes a lot of energy for the amount of gases you get. You can prove the GEET engine is bullshit at home; get an extension cord a Pyrex baking dish and a couple of glass jars and some salt and water. Split the end of the extension cord and strip the ends and put one end in each jar, fill the tray and invert the jars under water so that they are upside down on top of one of the electrodes and full of water. Plug it in, you will see gas starting to come off of each electrode. One will have twice as much as the other, that's the hydrogen. Then see how long that it takes 120 volts to fill a small jar with hydrogen. Way too long to run any sort of engine off of.
RE: Is The Oil Industry Suppressing Alternative Fuels? We can run an engine on tap water!