I think if you are already paying for TBN,
Terry's interpretation is well worth another $5. He takes a careful look at each wear metal value ... and then looks for patterns and wear metals in
relation to each other.
He has also dealt with the labs of various companies/blenders so he will be better able to tell if a value is wear ... or an additive. Silicon, for example, can be an anti-foamant additive, residue from new gaskets or sand particles. The first two are harmless if they show up, the last one isn't.
It was
Terry who thought the elevated barium in my oil was related to the catalytic (pre) converter dying.
I'll be sending Blackstone another sample in a week or so and will have
him look it over. We'll see if the barium's even worse or not.
