Never ever read this before and I hang out at
Bob Is The Oil Guy - Powered by Motor Oil which is about nothing but oils and filters so I'd like to see this data.
All I know is what my oil analysis says because it shows impurities and also the TBN of the oil. Add in the fact that after 119,000 miles there's nothing wrong with my cats I don't think I'm going to rush out and buy a more expensive oil. In my Diesel I use Castrol.