https://www.amsoil.com/newsstand/motor-oil/articles/cleaning-up-the-competition/?utm_source=newsletter&utm_medium=email&utm_content=article&utm_campaign=PC_December_Newsletter_2018&_cldee=YnJhZGxleWZyZWRyaWNrZmlzY2hlckB5YWhvby5jb20%3d&recipientid=contact-30bc349f180ee61180ee005056827197-c76ba86088914b1b84ef3116afc70745&esid=37aea019-9efc-e811-9100-005056988f87 (https://www.amsoil.com/newsstand/motor-oil/articles/cleaning-up-the-competition/?utm_source=newsletter&utm_medium=email&utm_content=article&utm_campaign=PC_December_Newsletter_2018&_cldee=YnJhZGxleWZyZWRyaWNrZmlzY2hlckB5YWhvby5jb20%3d&recipientid=contact-30bc349f180ee61180ee005056827197-c76ba86088914b1b84ef3116afc70745&esid=37aea019-9efc-e811-9100-005056988f87)
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 :D
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.