Nissan recommended procedure for checking CVT oil. (Reminder: This is from the service manual, not the owners manual-Nissan apparently would prefer we not perform any service on the CVT.)
This is not verbatim from the manual, but the content is all here. I found the manual format confusing and hard to follow, had to read it through several times to get it all. Hopefully, this is better.
1. Make sure CVT fluid is at normal operating temperature (about 10 min of driving on a warm day.)
2. Park on a level surface and apply the parking brake firmly.
3. Move the gear selector through the entire range while holding foot on brake. Place transmission in P or N.
4. Pull out the CVT fluid level gauge after pressing on tab to release the lock.
5. Wipe fluid off the CVT fluid gauge (they specifically say use lint free paper, not cloth!) and insert into fill pipe, rotating 180 degrees from originally installed position. Insert firmly, all the way until CVT gauge meets the top of the fill pipe.
6. Remove CVT fluid gauge and make sure fluid level is within specified range.
7. Reinstall CVT fluid gauge in the fill pipe in original position, making sure it is securely locked.
In other words, aside from the locking dipstick, you check it like almost all the other conventional auto trannys out there.
Cool. I'm going to check mine soon.