Buyer beware -- the Better Business Bureau of Southern Colorado has issued a warning to consumers about gas-saving devices -- they may not work. Not only that, but they can damage your car, the BBB says.
Products that allegedly boost mileage by 6 mpg or imporve fuel economy up to 26 percent or are approved by the federal government "for the most part are without merit," the BBB reports.
The Environmental Protection Agency has tested more than 100 of the claimed fuel economy devices -- including mixture enhancers and fuel line magnets -- and found that very few, if any, improve gas mileage. And some may actually damage a car's engine or increase exhaust emissions, the BBB says.