The CVT problem isn't the fluid. When sevice codes are for internal electrical solenoids and belts coming apart. Nissian only wishes they could change the service interval to make the problem go away. As far as your SRX, the trans fluid is brown from the factory, most replacement fluids are redI’ve read that as well- Nissan CVTs are made by Jatco (Japanese automatic transmission company) and are known to be failure points in the affected cars- they probably wouldn’t be so problematic if owners did fluid changes every ~ 30-40K miles or so. Same with Hondas- they had a tendency to have issues (I had a 2006 TL) and I would get the fluid drained and refilled every other oil change (like every 15K miles with 3 quarts of ATF)- never had an issue. With the wife’s Cadillac SRX, they recommend fluid change at 150K miles- I did it at 60K and although I was told the fluid was a little brown, it wasn’t completely shot, so I’ll stay with that interval and the SUV works very well.