PHOENIX -- "I spent way too much in fuel this year to not do this" says Casey Baldwin.

Water can stretch your gas dollars?

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VIDEO: All the details

With several fleet vehicles, high gas prices almost put Baldwin out of business. He owns a business called "Countertops By Design".

But a new device - and some water - have helped him stay afloat.

"Now instead of filing up every two days, I'm doing it every three to four days. I'm saving hundreds of dollars a week" says Baldwin.

The hydrogen generator claims to maximize the gas in your tank by giving it a better burn.

Scientist Adrien Burkhart of Chandler is the brains behind the device.

"By adding hydrogen to that combustion chamber, we get you to a 95-plus percent burn rate. So now you're burning more fuel." claims Adrien Burkhart, Hydrogen Concepts owner

That answer may be confusing to most, but Burkhart says it's basic science. Water is made up of oxygen and hydrogen. The device converts water into fuel.

"...through electrolysis. A little electricity taken from your battery, you can break those down to the atomic level, so you end up with an oxygen atom and two hydrogen atoms. So that's what we're taking into your air intake to enrich the air to get your a better burn rate from your existing gasoline." Burkhart explains.

Mark Castleman is a regional sales manager with Brakes Plus. He's never used the device, but it's certainly peaked his interest.

"If this product does what the gentleman claims.. It certainly can help fuel mileage, economy, performance, everything all around. Id certainly like to see it." says Castleman.

Still, he says drivers should be leery.

"Things you want to look at: it coincides with your manufacturer's warranty, that there's no long term effects after it's been on the road with it." Castleman explains.

The hydrogen generator has been around for 2 years, with some 20,000 units already in use across the country.

"We've got a few hundred thousand miles on a unit and they're still going. They're very robust, very simplistic." says Burkhart.

Several pieces make up the system. It's installed in the front of your vehicle. Total cost: about $700.

Burkhart says "We're trying to keep everything low cost so everybody can save money, reduce emissions and help the environment."