I love the discussion. I'm sure it could go on for more debate about TBN & TAN... ect. All I know is, compared to the Universal Avg for this engine, my extended OCI on this oil did amazingly well as stated by the actual results. By line item, it's factual to say the engine had minimal wear metals and add pack was still quite strong (moly, Boron, Calcium, Phos, & zinc)... with an almost 2.0 on the TBN...flashpoint was strong... fuel dilution very low, and the viscosity stayed in acceptable range. Not that I care to really push it much farther than this.. and likely won't too often as the miles continue to creep up over 100k... I will run one more 20k OCI with the Pennzoil Ultra Platinum just for comparison sake vs. Amsoil. Outside of that, I will likely go back down to the 10k OCI. I can surely afford the few extra bucks for the oil and filter on that OCI routine... plus extra insurance and peace of mind that comes with a very solid oil and filter change at 10k.
Thanks for everyone's comments. I appreciate the expertise and commentary! Looking forward to reading others who submit their lab results and learning more from them!!!