The Morey'S Diesel Smoke Killer Fuel Conditioner & Injector Cleaner 1 Litre is a premium additive designed to enhance diesel engine performance and reduce exhaust smoke. It works by forming a protective film between moving engine components, improving compression, reducing friction, and increasing overall efficiency. Formulated to clean and maintain injectors, it helps restore power—boosting horsepower by up to 10%—while improving fuel economy and lowering emissions. Suitable for regular use at a 650:1 ratio, it also protects against wear, rust, and corrosion, extends fuel system life, and helps maintain cleaner, more efficient engine operation.