What kind of gas mileage are you getting out of your car? If you don’t put any kind of a gas additive in with your fuel you may not be getting the gas mileage you could be getting. Most cars would benefit from a better cleaner burning fuel and often times this lends more mileage, and better horsepower without having to use any different kind of fuel. A gas additive will essentially reformulate the gasoline so it burns better and will even burn more of the fuel efficiently than it would burn regularly in your car. I heard that 20% or more of your gas is not actually burned off!