Here is a video I did before the engine was taken apart. After a couple of minutes, the blue smoke is sort of noticeable. About 2-3 mins into the video.
https://youtu.be/Cq5dMGSIZ2A
Another video. At operating temperature. Blue smoke not noticeable. Only the black, when it gets som revs.
https://youtu.be/7-7FhNxVHfc
/Dennis from Denmark