Originally Posted By: INDYMAC
Originally Posted By: IPCOlsenVZ
The older version must have very high TBN. I never got a virgin TBN but when I got a sample from the Focus after the FF oil with an OCI of 7400kms/1 year I got a reading of 14.11.
The new XTL version has a virgin TBN of 8.9. After an OCI of 7100kms (1 year) I got a value of 6.1.
Was it keeping TAN in check while TBN was remaining high?
Not sure, I felt $100 for testing was enough for one interval (analysis + TBN + New TBN)
Originally Posted By: friendly_jacek
This UOA looks fishy to me. TBN too high, P too low, Zn way too low. There should be high Cu in second OCI in new Toyota engine.
The test looks realistic to me. TBN is high with this oil, P on mine have been around the 500 mark, Zn should be under 100 (zinc free). I cant comment of the Toyota side of things.
