As gasoline prices increase, consumers are looking for ways to increase gas mileage and spend less at the pump. But as prices go up, the Better Business Bureau warns county residents that scam artists of the late 1970s are reappearing with gas saving devices that do not work.
Among the products commonly advertised as gas savers are devices that attach to a car's positive crankcase ventilation line or carburetor and additives put directly into the gas tank. The list includes such things as special valves, replacement distributor rotors, air jets, magnets, pre-agitators, hydrocatalysts, "miracle" spark plugs, pellet or liquefied additives, and foam or liquefied injector systems.
The Environmental Protection Agency has tested many of these gadgets and with few exceptions found little improvement in gas mileage. In fact, others actually increased gas consumption or required illegal changes to a car's emission control system.