Looks like Marc is running Amsoil 5W40 European formula EFM which is MB-229.5 spec in his OM642 motor. He has 2008 R320 and those have DPF.
Blackstone Lab's average on my cdi is 50. They flagged it when it "spiked" to 107, which I concluded was because of me using Mobil 1 esp oil. Since I switched to Mobil 1 European Blend, the iron level came down to 83 on my last oil analysis.Just like with everything in this life, you never have solid borders.
I was sending oil samples to Blackstone Lab.
For them iron at 30 is red flag.
Send the question to your guys and see what they answer?
I am not all in on the M1 bandwagon and may try a different brand of oil at my next oil change.That shows how double-tongued oil analysis can be.
I did several samples back in 2011.
Now I compared couple of results from different oils.
For M1 ESP formula the average iron at the time was. 30.
I run synthetic Rotella T6 in my Powerstroke and average for this was 17
Looks lie between 2011 and 2017 Blackstone allows M1 to generate 4 times more of iron particles.
Do you smell a rat?