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First I thought I knew what rattle you were talking about, but the more I read these posts, the less confident I am.
If it's valvetrain related, can you reproduce the same noise with 0W-20 oil as well as thicker 5W-30, or even 10W-40?
I had always assumed that, since the operating range is between 3000-5000 rpm, everything under 2000 rpm is considered "lugging", and that's why I heard those unusual rattles.
Sent from a potato
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