Hey everyone, first post.
I did two oil changes recently and thought I'd share my findings. One on my own '97 BMW E36 2.5l and another one '06 Opel/Vauxhall Corsa C 1.0l (this one was long over due)
BMW used oil looked fine to me. M1 0w-40 New Life ran for about 10-12k km. I afterwards cut open...