Wynn's Xtreme Diesel System Clean is designed to clean, restore, protect and maintain efficiency of modern 'high pressure common rail' diesel engines. It restores engine performance, fuel economy and reduces exhaust emissions. Cleans and protects the engines fuel pump and injectors. Maintains cleanliness of EGR valve and DPF. Use after miss-fuelling diesel engines with petrol to restore lubrication to critical engine components. Reduces deposit formation in fuel systems.