I seem to recall some years ago there was a product being marketed as a fuel saver that used platinum and rhodium to maximize the burn in the combustion chamber. The ad was in all the papers and called something like 1-800 less gas. For around $300 you got the kit, which was basically a plastic bottle with some vacuum line and fittings, and the solution to put in it. You would hook the vacuum line up to your manifold or carb somewhere and it would draw air through the solution and pick up the platinum particles. Platinum is what is in a catalytic converter that burns off the un-burnt fuel in the exhaust. After installing it they said your carb would have to be adjusted and the idle speed lowered as it would idle higher with the system. Supposedly you would not have to depress the accelerator as far to drive, thereby using less fuel. They claimed that fuel economy would improve by 20% or something and would last for over a year. After that you had to buy another bottle of their solution for around $175. I remember calling the number and getting all the info but gas was not so expensive back then so didn't bother trying it. It was just as economical to spend the money on the fuel as it was the kit. I don't think it would matter how much we improve our gas mileage. If we could get 100 miles to the gallon, the price of gas would be $20 a gallon. The oil companies need the revenue to keep people working,(oil industry employs millions) and the government needs the taxes so they have enough money to mismanage. I thought gas was over priced here..... take a look at European prices. They are up around $8 a gallon.