Well, I don't follow standard service intervals, but instead let the watch tell me when it needs serviced. To date, I haven't had to service any of my watches....
I can say that when the time comes to service my PO, I most certainly will not use the New Jersey (lack-of) Service Center. I had the watch there for another non-movement issue & the experience was horrible & IMO they were seriously trying to rip me off. They'll never see a watch of mine there again. I'll find someone local instead...