Originally Posted By: HKPolice
Weak oil add pack IMO. Low zinc, boron & moly which contributes to higher wear rate. I would lower your next OCI on this oil.
I agree, a good oil will have both Moly AND Boron, unless it has a group 4 German Synthoil base stock, then it just needs Boron (At least 50 ppm of Boron and 100 ppm of Moly). The MC oil in question does not contain enough detergents either (Less than 2000 ppm is only good for a short OCI in my opinion).
Not sure if the high Iron figure is from adding the ATF (One daft idea as it might contain additives that degrade the oil seals AND it often thins the oil) or the fuel contamination. Might be a bit of both, plus the long OCI.
If you do long extended OCI's and are concerned about potential deposits, don't use ATF or brake fluid, use a major brand (Castrol, Liqui Moly and Amsoil all make flush additives) idle use only flush additive just before an oil & filter job. Any flush can increase oil leaks for a while due to the false oil seal effect (Might need a change to an HM oil or stop leal additive in a bad case).