Just a bit confused about "after-run oil" I had an engine main bearing fail after about 20 hours running and the supplyer refused to waranty the item because I didnt use after run oil even though I have used the engine regulaly (a couple of times every week). Friends in the club, almost to a man, say the bearing was at fault and say they never use the oil after flying and report zero problems. Comments please as I feel the suppler is avoiding his responsibility. CP