Carlube Catalytic Converter Cleaner is formulated to clean and protect your engine's fuel and exhaust system. It removes carbon and resin deposits from the catalytic convertor, engine, and Diesel Particulate Filter (DPF) in diesel engines. When added to the fuel tank, this powerful formulation reduces harmful emissions, optimizes fuel efficiency, and improves overall performance, restoring power quickly. Simply pour the contents directly into the fuel tank. Suitable for all petrol and diesel engines. Use every 3 months to help your vehicle pass its MOT emissions test and extend engine life. Key features include cleaning and restoring the entire fuel & exhaust system, improving fuel efficiency and performance, reducing harmful emissions, and being easy to use. It is suitable for use in petrol and diesel engines, and with turbos.