HHO Gadgets at SEMA 2009 - The Truth about Water Car Gas Gadgets - Popular Mechanics

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Since I did my last story debunking hydrogen-on-demand, documenting an NBC Dateline story I participated in, my e-mail has been relatively free of the hydrogen-gadget feeding frenzy. Within a few weeks of that story last spring, the number of people vilifying me and accusing me of being in the employ of Big Oil was remarkably high.

Now, maybe because the price of gasoline has come down, people aren't so desperate. And as everyone is trying to weather the economic storm, it seems there's no time or energy left over to try to circumvent the laws of physics.

The SEMA show this year is also blissfully short on bogus gas-saving gadgets. Few seem to be peddling fuel-line magnets , intake-tract vortex generators, vapor injectors or other stuff that doesn't work . It's actually a refreshing change. Unfortunately, there are still some throwbacks selling additives and chemicals that claim improved fuel economy. Sigh. P.T. Barnum was right. There's a sucker born every minute.

And, of course, there are still die-hard hydrogen-on-demand holdouts out there, claiming dramatic improvements in fuel economy by burning water in your car. On the floor I even found a couple of vendors selling systems. Not just backyard systems, either. I'm talking engineered systems with remote water reservoirs ...

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