LOL LOL LOL.
Look at the TBN on conventional SN certified Pennzoil. TBN is one way to cover a weaker base stock as well. So if it is combined with a strong base stock like PAO or Ester, you can end up with an exceptional product. Though nothing is invincible
![Cheesy :D](https://www.ecoboostperformanceforum.com/Smileys/ES_SMILEY_SET_20071121/cheesy.gif)
Also keep in mind as things progress, oils are moving to less detergent and less anti-wear additives. Amsoil is no exception. Probably to accommodate upcoming SN PLUS requirements, but more to address the widening reach of GDI and boosted applications. Less is more etc w regards to LSPI.