Oil sampling used to be very common in piston aircraft engines. Until folks started doing some testing. Several have caught two samples, labeled them differently, sent to the same lab, got different results. Tested that with several companies. I dont sample mine any more.
Charlie

The data and opinions contained in these posts are the results of experiences with my equipment. NO CONCLUSIONS SHOULD BE DRAWN FROM ANY DATA PRESENTED, DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT TO REPLICATE THESE RESULTSj