CLINGING MOLECULES PROTECT FROM THE STARTDescriptionUp to 75% of engine wear happens while your engine warms up. When the engine stops oils drain off critical engine parts, however Castrol MAGNATEC’s intelligent molecules don’t. They cling to the engine like a magnet providing an extra layer of protection.Castrol MAGNATEC’s formulation protects from the moment you start, dramatically reducing engine wear*.Castrol MAGNATEC. Instant Protection From The Moment You Start.*As tested in the industry Sequence IVA wear test.ApplicationCastrol MAGNATEC 20W-50 is suitable for use in automotive gasoline engines where the manufacturer recommendsan API SP or earlier specification 20W-50 lubricant.AdvantagesCastrol MAGNATEC’s Intelligent Molecules:Cling to critical engine parts when the oil drains downAre combined with synthetic technology to provide increased protection in high and low temperature applications