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What thin oil are you running.
NO Proof - just observation:
When I had switched to Redline 5W-30. (not the EURO) -- I thought the engine ran so quiet.
My guess that any FE oil would make the TAPPING louder esp at the end of the OCI.
I run the PP EURO 5W-40 in Summer and the LL-01FE 0W-30 in Winter
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