Engine oil Shell or MOTUL

I just run Motul. 7100/7200 or the 300v.

I have a buddy that used the Shell Rotella diesel oil that is dirt cheap for his 2009 r1.

Years ago I went down the oil rabbit hole and now I recommend motul 7100 4T

Now if you were to get Motul 300V, there would be a real difference there. Higher end “boutique” oils have additives, such as esters that will build up a film on moving parts over time, adding a layer of protection if for some reason you were to lose oiling to that part.

Motul 8100 x-clean 5W40 seems to be the sweet spot, all of my friends drive it in EA113/EA888 engines.

Other Euro brands such as Castrol or Motul are also fine choices

I used Motul and it made shifting noticeably better

I used the Kawasaki 10w-40 for the first year I rode mine, it would always have an odd mis shift here and there. Last year I used Motul 7100 and it made a huge difference, way less shifting issues

I'm at 365,000 km and switched to Shell Rotella T6 probably 30-40k ago. Oil consumption was at last halved - the detergents in that oil really help clean up deposits in the rings, or so I'm told.

If you are considering an oil additive, best practice is to instead use higher quality oil (I like motul) and select one which matches your use case.