Originally Posted by marco5

Sorry I disagree. I just talked to two Mercedes Benz mechanics that also disagree with all of these details. I'm trying to get them to sign up for the forum to join this discussion, because it's a good discussion. These were old school mechanics that worked at the dealer in the 90's.

If we both drove two OM617's/616 or 603's over 30+ years, the exact same way and I changed my oil every 3000miles and you 7500miles using the same OEM oil, filter, I would have significantly less ring and overall engine wear then you.

I'm talking about compression, actual ring play/wear, timing chain stretch (using a dial gauge), and just overall cleanliness of the engine along with oil analysis results.