That's because what you read is just a six sentence abstract of a 14 page paper. You haven't read the book, just the summary on the dust jacket. You have to buy the paper to get the detailed information.
That Penrite paper is probably very good. In the '80s, Pennzoil published a very nice booklet titled Motor Oil Myths. I gave away a lot of those. I wish I still had one. They were written to correct common misconceptions in a way that didn't insult the customer. Telling your customer he's a dumbass is a good way to assure you'll never sell him another drop of oil. It didn't address friction qualities of ZDDP. 99.99% of people couldn't care less.
Lake Speed Jr is a knowledgeable guy. He's engaging and personable. While informative, his videos are made to generate views so he gets paid. I've heard he's responsive. Why don't you write to him and ask for his opinion? Be sure to reference SAE paper 962036. Also be sure to tell him you haven't read it.
