Hello skytissue and welcome to the NICO Club Rogue Forums!
Answers to commonly asked questions can be found in the Official Rogue FAQ.
In regards to the CVT fluid, the dealership can determine if the fluid needs changing by plugging into the cars computer. The computer calculates the fluid 'life' and indicates when a change is needed. The CVT fluid is a special type designed by Nissan and Jatco (the transmission manufacturer) and is meant to last a very long time. The fluid is quite expensive, thankfully it does not need to be changed often. I have read reports of Murano and Versa owners with CVT's driving more than 100,000+ miles and the fluid is still in good condition.
You can read more about CVT fluid changes here:
zerothread/351240
Enjoy your Rogue!