Patented Cataclean Diesel is a complete engine, fuel, and exhaust system cleaner formulated for diesel engines. It helps reduce carbon build-up while cleaning critical components such as diesel fuel injectors, oxygen sensors, cylinder heads, and exhaust system components. Cataclean Diesel does not alter fuel composition and is safe for diesel engines when used as directed. Independent emissions testing has shown Use Cataclean Diesel to help address common drivability concerns such as power loss, hesitation, rough running, and hard starts. It can be used as a preventative maintenance treatment, as a pre-treatment before emissions testing, or to help extend the life of diesel engines and emissions system components. A cleaner-running diesel engine helps support proper catalytic converter and diesel particulate filter (DPF) operation. For best results, use Cataclean Diesel up to four times per year to help maintain proper engine operation and emissions system efficiency. One application may not resolve severe existing issues, but regular use can help maintain cleaner system performance and support long-term engine health.