Also remove your engine cover and direct injectors to lower your Cylinder head temps during summer driving......
It has improved performance and cooling for me.
https://www.stle.org/images/pdf/STLE_ORG/AM2016%20Presentations/Engine%20and%20Drivetrain/STLE2016_Engine%20and%20Drivetrain%20III_Session%203C_C.%20Esche_The%20Role%20Additive%20Chemistry%20Plays.pdf
This study says you are doing something good adding a good slug of mos2.
Which is probably...
Personally I think every manufacturer needs to lower their OCI's.
Especially if the engines use DI - - so much more soot and carbon end up in the oil from blow by.
10k+ is too much for most city driven vehicles.
Low tension rings can old take so much.
You would think by 4, you would get something.
Does he do any highway driving - - if not go for a 1 hour drive and drop 1 gear.
Cruse in 5th or 7th depending on the trans