Thanks again for the help. Today I did my own CVT fluid drain and fill. First I drove the car in traffic to get the engine and fluid up to operating temperature, stopped along the way at Autozone and bought a gallon jug of Valvoline CVT fluid. I followed this link exactly. It helped me out a lot, I really appreciated the super detailed instructions.
2018-nissan-rogue-cvt-fluid-replacement ... 25862.html
I put the car up level on 4 jackstands, even used my bubble level to be sure it was as straight as possible. Then I removed the overflow bolt and let it drain for a good 20 minutes, when it did finally slow to a bare trickle of fluid I put the bolt back in. I got almost half a quart out of the overflow. I think that was because of the added amount of fluid from the Justice Brothers additive.
Then I cycled the gears and drained the fluid from the pan, measured what came out, it was just over 3 quarts, I put the pan drain plug back in, torqued it to 25 ft-lbs and used a new crush washer on it. Then I removed the overflow plug again, just a good squirt of fluid drained out. I was not real quick putting the plug back in so I added back about half an ounce of new fluid to make up for the slight fluid loss, marginal as it might have been.
I went for a test drive, the CVT did great with the Valvoline, it ran very smooth and quiet and still had very good throttle response. I drove the car again tonight about a 35 mile round trip, part of it at 70 mph on the Florida Turnpike, everything was fine, good smooth operation from the CVT.
I also bought a CVT dipstick from Amazon. I saw a Youtube video of a fluid change in a 2018 Rogue, the guy in the video said you can use the same stick for an Altima in a Rogue. I tried it on the car today but I need to calibrate it before I can be sure it is accurate. If it works I will just use it for cold fluid checks anyway. The guy in the video said not to leave the stick in the fill tube, there is a problem with it interfering with the CVT somehow.
This was a lesson learned for me. Now I know I can do the drain and fill at home for a lot less money. I am going to do it again in about 500 miles to help get rid of any residual Justice Brothers additive. I will also take the car in to Nissan soon to have the right front strut checked out. It is making the exact same noise as the left one did and it is becoming more frequent now.
Jimmy