Gumout 32 oz. Aio Diesel Fuel System Cleaner is a diesel fuel system cleaner, anti-gel, and cetane boost. It cleans all components of the diesel fuel system using potent Nitro-D power detergent. It improves fuel economy, boosts cetane, and restores horsepower. It provides anti-gel protection and removes existing gel buildup. It reduces vehicle emissions and will not void the manufacturer's warranty when used as directed.