Magnatec 10W-40 A3/B4 is an oil with "smart" molecules that know what to protect and semi-synthetic technology. Protection and confidence from the moment you start your engine. Up to 75% of engine wear occurs before it reaches operating temperature. When the engine is turned off, the oil is drained from its critical parts, but not the smart molecules of Castrol Magnatec. These stick to metal surfaces like a magnet offering an extra layer of protection, ready to protect from the moment you start the engine. The intelligent molecules of Castrol Magnatec are always there, always ready, to drastically reduce wear when it is most generated, that is until your engine reaches its operating temperature. as measured by the Sequence IVA international wear test standard. It is suitable for use in gasoline and diesel engines where the manufacturer recommends a viscosity oil of 10W-40, specification ACEA A3/B4,
