Originally Posted by buster
Originally Posted by DBMaster
I don't think those deposits look that bad. The Skyactiv engines have significantly higher compression than average (13:1). Part of the way that is achieved is through the use of special rings. Mine has 116,000 miles on it and I have been using 0W-20 for the entire time. I was going 30,000 miles between oil changes when microGreen filters were still available. Now, I'm at 15,000 mile OCIs with Mobil 1 0W-20 EP. I have never had to add make-up oil. So, I'm either getting fuel in the oil that offsets oil loss or the 0W-20 isn't leaking any measurable amount of oil past the rings. My UOA after 30,000 miles didn't show significant fuel dilution.
DB, have you ever posted a UOA? That would be interesting to see.
I have, but I'm too lazy to search for it. It's out there on this site, though. It showed what I was looking for - that my 30,000 mile oil was still serviceable and had adequate TBN.