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Looking for thoughts on what could be causing some higher oil consumption. Oil consumption: on a fresh oil change with 6.5qts and a new filter, I used 4 Quarts in 20 hours or just shy of 6 quarts in 26 hours (this was over a period of a month, I did a lot of summer travels, ) - Time on the Engine Since Major: 543 hrs (and has been regularly ran, meaning no long periods of inactivity) - Engine: 0360 180hp - Compression's cold, 77,70,79,77/80 (as of today) - Oil Temp (normal range 190 - 205) - CHTs 279/313/331/313 ETGs 1350/1300/1268/1300 - Usually run 2400 - 2500 RPM with MP ~22 at 7000 - 9000 - Spark Plugs look good, no excessive amounts of oil on them. (at least of the top plugs, didn't pull the bottoms based on compression) - Exhaust pipe looks normal (inside) - No oil leaks found (engine is pretty dry), no oily mess on the belly. (Only oil leak found was slight drip from the oil drain, after a week there was just a small spot on the floor of the hanger) - Engine has Superior Millennium Steal cylinders (no chrome). - Oil Brand Phillips XC 20X50 and using CamGuard as an oil additive. Oil changes at 25 -50 hours intervals. Since I have owned the plane from back in 2015 @253 hours SMOH, my oil samples have come back with elevated levels of Iron, and Chromium. Nickel and Copper were also elevated on the previous samples but not on the latest. (so some improvement). While the Iron and Copper readings have been improving, its only been minimally. (We have been monitoring at the last couple of annuals). Now that I have some trend data, my oil consumption has been increasing between sample readings. My biggest red flag was my most recent summer trip were I have spent flying from Kansas City to Syracuse NY (~7 flight hours) and was down ~2 quarts when I went to preflight for the return trip. On the return trip it was about 8 hours back, and it used 2 quarts as well. The engine seems to run fine, no plug fowling, strong. No indication there is a problem other than its using oil faster than I would like. Without pulling all the cylinders and re-ringing my A&P them my A&P is not sure how to troubleshoot any further? While I don't mind carrying extra oil around, I think my engine is trying to tell me something. The "what" I am not sure... Anyone got any ideas or suggestions? Thanks Neal