How long you had your Z and where do you take it for a good service and M.O.T
I bought mine last August.
I use Atkin Motor Engineers at Malton, they're a trader on here. I asked the same question on here and they came with many excellent recommendations. They're independant and Nissan approved. Granted it's a bit of a hike but given the nature of the car, it's better to travel for a quality job than go local for a bodge plus Chris, the lad who works on the cars, has a zed too and is very helpful. The run up the A1M and A64 is hardly a chore either.
So far they've done a gearbox/diff oil change, MOT and it's booked in for a P3 service a week on Monday. Personally I wouldn't consider anywhere else. If you want to speak to them you can PM Chris on Atkin666
Hope that helps