Hell, I would change my cvt fluid once a year if it’s a Jatco transmission.
I would rather have long oci for motor oil and change cvt fluid more frequently.
Most transmissions fail before engine oil related failure.
I really try do 25,000 mile oil changes but usually do it at 15,000-19,000 cuz I’m bored and get the itch to do an oil change.
But I’m more concerned with my Transmission than the motor engine.
If you’re doing 3,000 mile oil changes or whatever.
I rather waste money on cvt fluid than motor oil.
Since we all know Nissan cvts like to implode.
While the engine only implodes if your drain plug falls out and you drive with no oil i presume.