Classic Racing Oil 15W-50 is premium, semi-synthetic motor oil specially developed for use in classic motor racing. A combination of synthetic and quality mineral base oils and carefully selected additives provide Classic Racing Oil 15W-50 with the following properties: Outstanding lubrication properties, even at very high operating temperatures High viscosity index Very effective shear stability Outstanding protection against wear, even under extreme conditions Ensures stable oil pressure Outstanding detergency and dispersion High resistance to corrosion and foaming   Application Classic Racing Oil 15W-50 is a premium, semi-synthetic multigrade motor oil, specially developed for high to very high-powered classic combustion engines. This makes Classic Racing Oil 15W-50 ideally suited for use in classic car engines specially prepared for participation in classic motorsports events. Classic Racing Oil 15W-50 is also highly suitable for use in the overhauled engines of high-powered, post-war classic sports cars. Product specifications API SJ/CF Typical standard analyses Density at 15 °C, kg/l 0,876 Viscosity -20 °C, mPa.s 6800 Viscosity 40 °C, mm²/s 131,00 Viscosity 100 °C, mm²/s 17,30 Viscosity Index 143 Flash Point COC, °C 226 Pour Point, °C -27 Total Base Number, mgKOH/g 8,0 Acid number, mgKOH/g 2,58 Sulphate Ash, % 1,02 Noack, % 9,8