Welcome Diablo3.
I recently bought my Z as well and will be in at service on the same interval in May or whichever comes first.
The guys dropping the oil at 1200 are doing so to get any of the shaved metal that will accumulate during the first miles put on the car. Or they are wanting to go to synthetic quicker. Is it necessary...no. Is it a good idea...yes relative to newer oil is always better than older but at what cost?
One word of advice if you go synthetic you cant go back or at least not recommended. Ester is a a type of synthetic. Full synthetic blends have ester in them. So if you dont want to keep up with the price of putting the more expensive blends in your engine then you may want to consider sticking with the regular stuff.
Enjoy your Z and probably see you around on the roads.
