Originally Posted by gpshumway
Wow. That KV100 is pretty poor, Amsoil Euro starts out at 12.2 cSt - that's 25% shear! Pretty poor performance from such an expensive oil which is recommended for high performance, long drain European applications.
The wear metals look pretty good compared to your last UOA.
TBN of 2.2 shouldn't be scary in this low-SAPS oil, they generally stabilize in the 1.8-2.2 range for many miles.
Prior to this UOA, this would've been my first choice in the Amsoil lineup for most street driven turbo Subaru applications, no longer. It'll be interesting to see how AFM does. Now someone should try AFF 0w40 (4-stroke powersports oil).
My co-worker runs the 5w40 in his MS6 which is why I switched to this in the first place. I did initially go with the 5w30, but I figured it would be of similar quality until I noticed how much had burned off... changed it soon after and wasn't really surprised to see the results here. I'm thinking the 5w40 full saps will look much better. That stuff just seemed to be muuuch thicker when I was filling it up. You can look forward to that UOA in approx 1 month lmao. 50+ miles/day to and from work 5 days/week. Love it.