While this all may be entirely true - I had to laugh at the 100K teardown. wow - 100K!Quantum Blue from BND Automotive. I have over 100,000 miles driven with it, in both my 300 SRT8 and R/T Shaker. Custom blended for your car, climate, and intended usage. Brian also offers his own premium hi-spec oil filters. Quiets Hemi tick. I run his products in my entire drivetrain and my mileage did improve a bit. Recommended.
If you want a smoother running engine, greatly reduced engine wear, better mileage, clean injectors, and more - check out his Aces IV. Expensive, but worth it. Google the article written a few years ago by a well-regarded industry expert who tested an engine the equivalent of 100,000 miles, and see what he had to say.
I have seen teardowns of taxi and muni service engines with 250K plus running nothing but 30 weight dino oil that showed no or little measurable wear. Tearing an engine down at 100K and thinking it is significant of anything is like basing your lifelong MPG results on the very first tank.