A few days ago I was looking at the workshop manual and noticed that Land Rover now (I don't think they did in the past) gives a spec for oil for the 5.0L motor. In the past it has always been the Castrol Edge OE that is specially made for Jaguar Land Rover. It appears that Mobile 1 5w20 meets the WSS-M2C925-A spec. There are also probably other oils out there that meet that spec.