Mandy is right. Leaving your gas tank near empty, night after night, and running near empty will cause excess condensation to build up, and the inside of your gas tank to possibly corrode. In addition, condensation in the fuel can lead to rough engine performance. To prevent such fuel tank problems, use any of Berryman's line of fuel additives. These products contain detergent additives that prevent rust, disperse moisture and the build up of fuel related carbon deposits. Adding a Berryman fuel additive before adding fuel to the tank assures proper mixing.

Modern fuel pumps are submerged and cooled by fuel. If you run your tank on empty or low all the time you risk burning your fuel pump up. That can lead to expense!