This additive controls combustion chamber residue, plus cleans and protects surfaces of the fuel system and intake tract. Ideal for cars that are stored or driven infrequently. One bottle treats 55 gallons.
From the manufacturer:
Driven's Carb Defender Fuel Additive is formulated to protect against ethanol corrosion. Corrosion inhibitors work to prevent expensive repairs and diminished performance caused by ethanol-blended pump gasoline and the moisture it attracts. High levels of ethanol dilution in motor oil can lead to rust and other corrosion problems in the fuel system and inside the engine. Keeps the carburetor functioning properly and is designed for the unique needs of classic, race, power sports and lawn and garden engines that spend much of their lives sitting in the garage.