Castrol Motorolie Magnatec Start Stop 5W20E 1LCastrol Magnatec Stop Start 5W-20E combines duallock molecules with our most efficient fully synthetic base oils. So you'll dramatically reduce wear by 50% and improve fuel economy. This oil is mandatory on 1.0 3-cylinder EcoBoost engines and is also fully compatible with older versions. Ford strongly recommends that the oil be used with all engines that require the oils of the WSS-M2C913-B, WSS-M2C913-C or WSS-M2C925-B specifications.Developed specifically for Ford EcoBoost engines, the new engine oil promotes fuel savings while meeting and exceeding the wear resistance requirements of WSS-M2C913-C in certain areas.