Castrol 5W-30 F-Trucks CK-4 has been designed to meet Ford Trucks’ WSS-M2C213-A1 specification, which is based on the Association of European Automobile Manufacturers’ (ACEA) Oil Sequences E6 and E9 ...
Others might use a 5W-30 synthetic blend. This is all to say that your car wouldn't know if you're running Castrol or Mobil ...