BROKEN ARROW, Okla. -- What would you say if you could increase your car's gas mileage by 50, even 100-percent. A Broken Arrow car mechanic is a true believer in a fuel-cell technology that adds hydrogen to gasoline, which he says then burns more efficiently. It's called the Hydro-Assist Fuel Cell. Many have questions about whether it works. Randy Catlett says it does.

Randy Catlett has spent nearly 30 years as a car mechanic and knows a thing or two about cars.

"I've gone through 12 schools for General Motors on computer system on the cars, carburetors, fuel injections, diesels, rear ends, air conditionings, turbos electrical," Catlett says.

This device though is one you probably haven't seen on a car. Called the Hydro-Assist Fuel Cell, it produces hydrogen gas which is then fed into the fuel system via the regular car's air intake. When hydrogen is mixed with gasoline, Catlett says the gasoline burns more efficiently a lot more efficiently. He says he's gotten as much as 50 miles per gallon on his Ford pickup truck.

"Taking octane away, adding hydrogen in with it, which enriches that fuel mixture again."

If you think it has a too good to be true ring to it, you're not alone. Catlett understands there are lots of skeptics.

Why isn't every car manufacturer, GM, Ford, why aren't they putting something like this on every one of their vehicles?

Randy says, "If they made your vehicle go 120 miles say on a gallon of gas, big oil doesn't like that."

"I won't get into the conspiracy theory issues on all because that's not me. I just want to put a system on your vehicle that is not snake oil. We don't have to worry about the end result because we know that they're going to be there."

Catlett says the Hydro-Assist Fuel Cell is guaranteed to boost your gas mileage by 50-percent or the dealer will buy it back.

The inventor of the product, Dennis Lee, has his share of critics who claim he is a scam artist, and there are reports that he has been fined by the attorney general in several different states. Catlett though says if you don't believe the product works, you can come to the shop and you can drive his truck and judge for yourself.

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