Shell Helix Ultra Professional AF 5W-20 for gasoline engines was formulated specifically for use in Ford vehicles with "Ecoboost" engine requiring WSS-M2C948-B and where API SN or ACEA A1/B1 are specified. It is also backwards compatible with majority of Ford gasoline engines included those require the following oil specifications of WSS M2C913-B, M2C913-C or M2C925-A