Whatever it is, it doesn't have much shear stability, and all indications (including testing by Mobil) are it's an ordinary Group III synthetic or perhaps even a blend, just with some special additive package, which doesn't include much in the way of esters at all. In any event, it almost certainly isn't their factory fill, given the cost. They don't even push it up here at the dealer. Mobil provides the service fill up here.
As an aside, we may be in for some interesting times, well, interesting to us, at least. Castrol is trying to have the OEMs they serve, the Renault Group in particular which is relevant here since it includes Nissan and Infiniti, to rationalise factory fill and service fill across the line.
As an aside, we may be in for some interesting times, well, interesting to us, at least. Castrol is trying to have the OEMs they serve, the Renault Group in particular which is relevant here since it includes Nissan and Infiniti, to rationalise factory fill and service fill across the line.