My results using Castrol Edge Black Bottle 0W20 with Titanium
So much for wanting to run extended OCI's, the TBN is at 2.9 with just 6 months and 5,000mi on the oil. Either the virgin oil has a low TBN to start with or the engine just beat the fudge out of this oil.
There is titanium in the newer bottles of Castrol Edge BB. Not sure how much in a VOA but seems weak in this UOA. Previous oil was M1 and other oils I used did not have titanium as an addtive so it was not additive carryover