You guys were right, oil level was a bit high but not by much.
When I poured new oil in few months back it was really cold so it was settling slower than I thought. I'm always careful about this things but obviously got it wrong this time.
But, this was a new oil after rebuild with maybe 10 minutes of work time and colour is worse than the old oil which I've changed after 2.5 hours of work time.
I'm using Bauer diving compressor oil so oil itself is not an issue.
Everything is still the same even after lowering the oil level. It still blows blue smoke out of the breather.
Mind you, there's not a lot of smoke and it's visible only when I point a flash light at it, under normal workshop lighting it's not visible so I may have this problem for longer than I think I do.
I have topped up my 6.8L bottle two times this week from 260-270 bar up to 300 bar without any issues.
But, there is evidently a problem and potential bigger malfunction waiting to happen.
In any case, after two cylinder rebuilds, there's no point in rebuilding them for the third time. I'll buy both new cylinders with all the parts and change them completely.
Only question is when, my spring vacation is over, little free time that I have on my hands I spend rebuilding my lathe which won't be finished any time soon.
