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They may help because they will make your wallet lighter and lighter weight uses less gas
I find it hard to believe that people still sell these things. If they would really help, the car manufacturers would all use them rather than spending millions of dollars trying to increase mileage other ways.
Dave is right. I haven't seen a add for one of those for quite some time. But if they can still sell the Tornado air device I guess they can sell the magnets too.
Ford Lifer, they work so good you'll get 10,000 mpg. I've got 4 of em, thats 4- 250# pull each magnets. You attach them to a semi and let him pull you, it only works on the highway and only if the semi's going in the right direction. I used a 25# pull magnet with 20' of rope on a bus while riding skateboard in the 60's, when you wanted to unhook just yank the magnet off. Death was always a corner away. Carl.........o&o>.....
A guy installed the following gas-saving devices; air filter, Tornado, spark plugs, fuel line magnet, synthetic oil, bed cover, fender skirts, air deflector, and everything else that was a "proven" gas-saver. He drove 3 miles and his gas tank overflowed!!!
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.