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      06-17-2014, 09:57 AM   #1
eocrm3
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Drives: 2015 M4
Join Date: Mar 2013
Location: Texas

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At what lead level do you swap rod bearings?

I recently received my first oil analysis from Blackstone on my 2010 m3 with 55,100 miles.

The oil sample was taken from oil with 3,700 miles on it. All levels were at average readings.....the only slightly elevated level was the lead level which read at 9 (7 being the average).

I wanted to know at what lead level should I be concerned and replace rod bearings....is 9 high enough to merit replacing the bearings?

Thanks guys.