Smoking engine oil additive prevents engine oil from entering the combustion chamber of the cylinder, where the fuel mixture burns with the engine oil, causing the engine to smoke. In most cases, engine oil gets into the cylinder due to worn engine parts e. due to piston rings and worn 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 substance is intended for use with 5 liters of engine oil. Suitable for use with diesel and gasoline engines, as well as mineral and synthetic oils. Do not use with other oil additives