Wynn's SP46751 Diesel System Cleaner is a powerful 325ml additive designed for all diesel engines, including common rail and pump injector systems. It effectively cleans the entire diesel fuel system, enhancing combustion and significantly reducing black smoke emissions. This cleaner also provides essential protection against rust and corrosion, while lubricating fuel pumps and injectors. It is safe for use with catalytic converters and diesel particulate filters (DPF), and is recommended for diesel fuel conforming to EN 590 standards.