Device Scams

Lots of con artists are waiting to sell you gas saving devices that don't really work. The only way to really know what effect a device or fuel additive has had on your vehicle is to run it on a dynamo and measure it. The Mythbusters test out three supposed gas savers. One is a magnet, another is using acetone as a fuel additive and the third is a carburetor claimed to provide hundreds of miles per gallon. Each one is found to either have no effect or actually reduce gas mileage. Watch and see!

Run Your Diesel on Used French Fry Oil

Watch as the Mythbusters take used vegetable oil that had been frying up French Fries. Then they do nothing to this oil except filter it to remove chunks. Then they put it in a diesel car with a stock, unmodified engine. The car not only ran, but it got 3.33 GPHM! The same car with normal diesel fuel got a slightly better 3.00 GPHM. Don't believe it? Watch the video!