Oil analysis was standard practice when I was involved in aviation. We would also cut open the oil filter and look for anything that was ugly and didn't belong there. I still have the oil filter cutting tool which is actually a huge tubing cutter. Obviously you can't saw the filter open because of the filings.
Speaking of Lake Speed Jr., old thread, https://www.v8buick.com/index.php?threads/new-oil-tech.222499/
