New owner in Alaska with intro and questions

Pat C.

Hey members, just wanted to intro myself and ask a couple of questions. Bought a used 10' gray sports coupe with the great 6sp. used that only had 1600 miles on the clock. Car even has the pricey 3m clear front shield, along with the K@N intake system; is a real beauty!! Been driving as much as possible before I have to put away for the winter. Had taken the front plate mount off along with the selling dealership's plate and mount on back.
First question, am wanting to change oil and have seen that the Nissan synthetic oil had an ester component as part of the formula. Dealership just told me Nissan has changed that recommendation to be able to use Mobil 1. Also, had seen a really good comparison about the K@N oil filters versus OEMs.Thoughts comments about one versus the other would be appreciated.
Secondly, did the 10s come with the "Z" rear license frame from the factory? Have seen some nice black metal units on ebay but would rather stay OEM if possible.
Sorry for making this post so long. Have been too tied up with teaching and the Labor Day weekend to post these comments.
Am 54 yrs. old and have had a really nice 78' 280 along with a briefly owning a 92' twin-turbo....Agh, sold it because I thought Vets were better. Duh
Pat