This is a high-performance additive to motor oil which ensures protection of piston rings and hydraulic lash adjusters from wear and negative corrosive effect of fuel combustion by-products. It comprises only oil-soluble components. The following is observed as a result of using the additive: increased resistance of the engine parts to wear and high-temperature corrosion; prevention of the rupture of the oil film; provision of a proper friction mode; warranty of reliable engine performance in severe operating conditions (traffic jams, trips with towing (cargo), engine performance at increased revolutions). It is compatible with all types of oils. It can be used in all gasoline and diesel engines with catalysts, with and without turbochargers, installed on passenger cars and commercial vehicles.