Hi Motorbike, good hearing from you. I thought the TAN was high too. Thanks for the tid bit on Maxima. Interesting. I agree with what you said about the detergent/dispersant.
With lower sulfer levels in fuel, blowby will be less acidic so lower TBN is ok. TBN retention is more important though so it should be interesting to see how it holds up. The sulfated ash is lower with he Mobil formulation.