Are higher wear metals from longer OCI - harmful?

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cos

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Nov 21, 2004
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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?
 
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Jun 23, 2005
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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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