Supreme quality universal oil of mineral base (STOU) specially developed for the application in agricultural mechanization for the lubrication of diesel and gasoline engines with and without turbocharger, in gear-box, transmission, hydraulic devices, wet brakes etc in tractors and combines - for engine, in older generation passenger vehicles - for engine, transmission (API GL 4), differential, in trucks - for engine, transmission, differential etc. It is also used in other agricultural, construction, mining machinery and industrial equipment. With application of this oil, the number of oils necessary for lubrication is reduced.