2007 Mercedes S550, M1 0W-40, 9,500 mi

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I plan to dump this oil @ 10k mi mark.

Should I be concerned with Copper?


 
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I think it looks good, thanks for sharing. Having said that, oil is cheap. No need to extend it as far as you could possibly go.
 
Could the copper be from the oil cooler? As long as lead doesn't spike your fine. Everything else looks pretty great. I think 10k is a nice round number and getting most of your moneys worth!
 
Originally Posted By: Sam2000
What was the driving style and time period for this oci?


75% City
25% Highway

If I recall correctly, It's about 1 year OCI
 
If you are concerned about the copper look at the ppm/mile. At 5000 miles you had 10ppm or .002/mile and at 9500 miles you had 13 ppm or .00137/mile. So less wear per mile in the 9500 mile run. Labs need to look at the ppm per mile as metal wear is related to mileage so IMO you had less wear per mile in the 9500 mile run than the 5000 mile OCI.

report looks great to me

Hmm, they say only copper wear increases with longer mileage, yeah right!!!!!!!!!!!!!!!! then they say their universal average is 9 ppm. I would look for another lab IMO
 
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