Higher gas prices mean business is thriving for companies that manufacture “fuel-saving” devices. One such product is a magnetized device that wraps around the fuel line just prior to the fuel inlet and claims to increase fuel economy from 5% to 20%. However, the EPA tested several such products and said there is absolutely no improvement in fuel economy. Air swirling technology installed in the air intake prior to the engine throttle has not lived up to its claims of increasing fuel economy from 7% to 28%. The EPA has tested fuel additives and found they do not result in fuel mileage savings. Drivers should keep their engines tuned and their tires properly inflated to achieve better miles per gallon.