SmogBuster busted

The fuel disc is a quarter-size piece of plastic. [...]

They retail for $299 each but are discounted for people who persuade others to sell them. [...]

The disc is to be taped or glued to the bottom of your car’s gas tank. Promoters say it significantly increases gas mileage and improves air quality. They don’t say how it works, beyond claiming it sends “holographic frequencies into the gas tank and changes the molecular structure of the gasoline.”

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