Are higher wear metals from longer OCI - harmful?

cos

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1,448
Location
Metro Detroit
I see wear metals at higher levels when OCIs are high (e.g. 10K) in the UAO section. Do these elevated levels cause any harm?
 
Messages
3,478
Location
Millbrae, CA
eventually yes 100 ppm has or was a max limit. but that is why a OCI of a "correct" time frame is needed because the oil maybe in good shape but it "holds" a lot of gunk and that is what will plate out as sludge and cause bearing wear, so change offten and do not worry about 10-15K drians. bruce
 
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