Wow. I was expecting to see some higher values as the engine (C90-8F) was installed new in 1960 and has never been overhauled but some of these are several times the average. The engine has 1100 hours on it. This oil has about 20-25 hours on it.
Tin is 84x the average. Is the C90 bearing made out of tin? Nickel is 190x average! Aluminum is 17x the average. Iron and copper are about 6x the average. Either these are real values or I suppose I could have pulled oil from the bottom of the sump and it isn’t reflective of actual metal contamination. I did take the sample about 30 minutes after shutdown, per instructions.
Tin is 84x the average. Is the C90 bearing made out of tin? Nickel is 190x average! Aluminum is 17x the average. Iron and copper are about 6x the average. Either these are real values or I suppose I could have pulled oil from the bottom of the sump and it isn’t reflective of actual metal contamination. I did take the sample about 30 minutes after shutdown, per instructions.
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