My 2017 accord sport and her 2015 Altima do not have a dipstick, just a check bolt. One of her daughters had a 2012 Rogue and it has a dipstick.
I find it easier with the check bolt, whatever excess just comes out
I’ve used Castrol transmax CVT fluid in her 2015 Altima since around the 50K mile mark. Did a 3X drain/fill initially then a single drain and fill around 75K mile mark and did another drain and fill around 100K mile mark. Currently at 107K miles on car
I believe the transmax atf/cvt has taken...
when you say the oil is dark is this on the dipstick?
I can run a 5000 mile oci and check the oil on the dipstick and it is honey colored, drain it and it is black as coal
The oil doesn’t degrade just sitting in the pan. I would take a nice long drive if possible when you can. A UOA would be able to tell you when better than we could