The Tunap 685 fuel system cleaner and additive is a high-performance solution designed for all diesel engines, including common rail and pump-injector systems. This 500 ml bottle effectively removes deposits from injectors and the combustion chamber, ensuring optimal fuel atomization and engine performance. It protects against new deposit formation, improves cold start behavior, and reduces fuel consumption and harmful emissions. The additive is suitable for all diesel and biodiesel blends, maintaining the cleanliness and efficiency of the fuel system.