Castrol Magnatec 5W-20 E is a fully synthetic lubricant suitable for use vehicles that require a 5W-20 lubricant that Meets Ford WSS-M2C948-B specification including vehicles fitted with the Ford EcoBoost engine. Up to 75% of engine wear happens while your engine warms up. When the engine stops oil drains off critical engine parts, however Castrol Magnatecs intelligent molecules dont. They cling to the engine like a magnet providing an extra layer of protection. Castrol Magnatecs unique formulation protects from the moment you turn the key, dramatically reducing engine wear. Now with ultra-refined molecules, for protection you can see, hear and feel. Castrol Magnatec. Instant protection from the moment you turn the key.