From the 2022 Sentra SV Owner's Manual:
OIL CONTROL SYSTEM (OCS)
Your vehicle's oil control system calculates engine oil and filter change intervals based on driving conditions. Driving in the following severe conditions will shorten the engine oil and filter change interval.
If the oil replacement indicator is displayed, change the engine oil within two weeks or less than 500 miles
Two of the "severe conditions" listed that shorten the OCS oil change interval:
Repeated short trips of less than 5 miles (8 km).
Repeated short trips of less than 10 miles (16 km) with outside temperatures remaining below freezing
Per the maintenance schedule, the synthetic 0W-20 SP oil and filter get changed every 10K miles for this Nissan MR20DD engine.
No word about 12 months maximum?
If there's a maximum of one year you'd do 5000 mile OCIs anyway.
That's what I'd suggest - 12 months, ideally after the winter season.
Do most cars have OCS? Does everybody dutifully change their oil when OCS alerts prompt that? ie: Any problems/failures with this tech -can it be trusted?
It's known as an 'OLM'. BMW started using it in the 1980s and VW
around 2000. Pretty common today. Some OLMs are better (taking
more factors into account), some are stupid. It depends.
Personally I actually use it though I just change the oil at half of the
(OLM) suggested interval. Both the Mini and GTI OLMs typically say
between 22.000 and 24.000 km (~14,000 mls), so I use to change oil
at 12.000 km (~7500 mls). Due to covid it's less currently but I still do
a max of 12 months.