It's all bullshit. Even the idiots who claim hydrogen generators assist a standard internal combustion (gasoline) engine are full of shit. IT's hype nothing more. Most people think higher octane fuel increases performance as well, but they are wrong, unless of course the computer will compensate by increasing timing, but for most vehicles, it's moot. Electric cars may be less polluting that combustion cars, but you still need to burn coal to provide the energy to charge them and that produces more pollutants. And then you have to manufacture them which creates more pollutants. Then you have to make their batteries which are the most toxic parts. In fact, the building used to produce power cells for a certain Japanese manufacturer is one of the most polluted places on the face of the earth. I doubt the electric car would hurt big oil much as most of them own the coal mines which provide the fuel for the electrical plants.