Nulon Pro-Strength Diesel Fuel System Extreme Clean is the ultimate fuel cleaner and performance booster for any diesel vehicle. State of the art additives actively clean and lubricate the entire fuel system, including modern ultra fine common rail injectors, preventing injector failure, often missed by regular cleaners. Corrosion inhibitors protect and flush the fuel system from water ingress that can lead to damaging corrosion and algae growth. Compatible with all diesel vehicles and modern injection systems and is safe for all DPF systems. Directions for Use: Simply add to a full tank of fuel. 1 bottle treats up to 100 litres. Use as required or once every 10,000km.