Originally Posted By: SR5
Originally Posted By: Quattro Pete
Originally Posted By: SR5
BD:However these fresh oil values compared to other oils rarely mean much in real world.
SR5: Sorry, in what respect? Not trying to be rude, I just don't under stand the particular point you are trying to make.
Likely because depletion rates vary greatly from one oil/add pack to another. You can have oil A with starting TBN of 10, and oil B with starting TBN of 9, and after 10K miles, oil A could be at 2, and oil B could be at 3.
OK thanks, that makes sense.
However because they are both Castrol Edge products, I would have assumed that they were roughly comparable. Atleast more so than a brand A PCMO and a brand B HDEO.
Sorry QP, thinking on it a bit more, I get your point.
In my head I was comparing the TBN of something like Kendall or Super Tech that tend to have a TBN of 8 to the Castrol, all of which tend to have a higher TBN (10 -11).
Yes your point is taken. Different add packs behave differently.