Imagine being able to increase your gas mileage by 20 to 30 percent.

The idea is that a battery separates hydrogen and oxygen from distilled water and then the hydrogen is injected into the intake system of the automobile. Supporters call the process "hydrogen on demand" and say it can be done with tap water.

A gentleman by the name of Carl Minks has been marketing a system through word of mouth and a website (aquagonow.com). He claims that the system can add between 20 and 30 percent to the vehicle’s gas mileage. 

Well, the press was quick to pounce on his claims. A senior automotive editor for Popular Mechanics, Mike Allen, says that he tested out the concept and got zero results. He claims that his gas mileage did not improve. Minks then countered and said it was done wrong by Allen. He  spouted gobblygook, stating the hydrogen generator used did not bypass the vehicle’s onboard diagnostic system, which may then compensate by adding more fuel.

The Minks’ system sells for $495 including installation. If you want to do the installation yourself, you can get it for $359.