Yeah I thought I had it beyond dripping with sarcasm. I actually did consider capitlizing Grand Poobah but like you said, wasn't sure he deserved it. I had a hard time initially appreciating the work that undoubtedly went into his rankings because it is buried after tons of egotistic opinions and attitude. Any time someone says that they can never possibly be anything but right, and anyone who criticizes them has always been wrong, it makes everything they say suspicious.
He obviously has some sort of hard on against zinc. Yes there can be too much of a good thing, and ZDDP levels are not the sole factor by which to judge an oil. To say that it does nothing, doesn't matter, etc, well I think that is is full of Poobah (that was for you, San). It's not as if all the oil companies had barrels of zinc and phosphorus just taking up space and got together to make a sneaky agreement they would all start adding it into their oils to clear out storage space. There is a better reason than that. He has proof that once up to temperature, some high ZDDP oils don't perform as well as certain other oils in his lab. That does not prove that ZDDP does nothing at all. To make conclusions about the validity of ZDDP period, one would need to test for that specifically. For instance, take one of his highly ranked oils, and somehow have virtually the same oil with no ZDDP, and test at cold start temperatures as well. Then let's see what conclusions we can make about ZDDP being obsolete, cumulative, or no factor at all.
Jackson touches on the topic of cold starts, and agrees that much of engine wear occurs at cold start up. However it seems all of his testing is at or above normal operating temperatures. I agree, operating temp testing is important, that's where a motor will spend most of its time, but since he says most wear happens when the motor is cold, why doesn't he test the oil when it's similarly cold? He says that his testing "automatically" addresses boundary lubrication. How does his testing "automatically" address boundary lubrication for a motor that has been sitting for a week? The ZDDP tribofilm effect can happen at temperatures under 80 F when metal touches metal. So I don't understand how Jackson can just write off the protection that a ZDDP tribofilm can provide before oil temps rise to normal levels by claiming that the only thing that matters is psi measurements at 230 F in his lab, while he simultaneously claims he has always been right about cold starts being by far the moments of maximum wear.
Oops, I guess I am now a "brainwashed zinc believer" and a "critic of his blog" who "cannot be trusted" because I'm "not an engineer" <there's the sarcasm, imagine my fingers doing air quotes as you read that>. You don't need an engineering background to see logical fallacies. A philosophy 101 class can help with that.