As the need for better gas mileage has becoming an even more important part of everyday life, companies have begun marketing products promising just that. Some of these products are air filters that go into the car's air flow system to make your engine work more efficiently. Some popular products are the Fuel Genie and the Tornado Fuel Saver. These are aimed at improving gas mileage by improving the air circulation in the engine and thereby making a better fuel/air mixture. Their guarantee for up to 28% savings in gas is backed by a 120 day money back guarantee.
Other options are chemicals that are poured into the engine's fuel tank. Some of these work by cleaning the fuel system and others work by altering the fuel's chemical mixture. STP, for example, has a complete line of products to clean and maintain the engine. The end result is the prevention of deposits that build up on the fuel injectors, carburetors, and combustion chambers, thus increasing efficiency and cutting back on loss of power. Some products, such as GTA Fuel Enhancer, alter the fuel in order to make the fuel burn more efficiently. Whatever the reasoning behind the different products, their main goal is the same: to burn fuel more efficiently to save money, and incidentally, reduce emissions and pollution.
What makes these products valuable to consumers is that their simplicity and low cost. Simply add the increasing gas mileage products into your tank before you fill it up. If using on consecutive tanks, of gas, just make sure to run the tank almost to empty, as the products are designed for a specific number of gallons of gasoline. Many of the additives require one or more fuel tank fill ups to reach their maximum potential, though you could start seeing payback in fuel costs immediately.