This is my first analysis on my recently purchased 2014 Mercedes ML350 Bluetec. A little disappointing Iron number considering the low mileage and short drain interval and 90% highway driving. Silicon is possibly a culprit as I found one of the air filter seals was torn. It has been replaced and will continue to test. Sticking to 5K change at this point. Sticking to 229.52 spec oils for now, as it is a CPO, so I am still under warranty. Would love to try the Mobil 1 X3 0W-40, but it is a little hard to find. It is the only 40W under the 229.52 approval.
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