aFe POWER Diesel Fuel Booster restores engine performance and protects diesel fuel systems from performance-robbing deposits. Ideal for all diesel engines. Will not harm after treatment devices or EGR systems and contains no alcohol. This all-around fuel improver includes a concentrated dose of the most important additives to keep your diesel engine running at its peak tune. Additives include a Cetane Maximizer to improve performance and a Lubricant for the HPP (High Pressure Pump) and injectors. The Fuel Stabilizer provides for long term f uel stability by keeping your fuel tank and engine free of rust and corrosion while an anti-gel formula helps to prevent diesel fuel from clogging the fuel lines, tank & filters and works to improve flow in extreme temperatures.