Smoky engine oil additive prevents engine oil from entering the cylinder combustion chamber, where the fuel mixture burns with the engine oil, causing the engine to smoke. In most cases, engine oil enters the cylinder due to worn engine parts, i.e. piston rings and tired seals. Stop Smoke reduces oil consumption and seals a worn engine. Instructions for use: Pour the contents of the bottle into the engine through the oil cap. 300ml of the substance is intended for use with 5 liters of engine oil. Suitable for use in diesel and gasoline engines and mineral and synthetic oils. Do not use with other oil additives