I have noticed that the TBN of the newer diesel oils is often around 8 where it used to be 10-12. I am guessing the calcium has been lowered to reduce SA in the newer oils(CJ-4)
If this is correct, what add is used for the more stringent soot control/anti sludge?
If this is correct, what add is used for the more stringent soot control/anti sludge?