Perhaps. What that PAO reduction tells me, is that there is more parity now between the two flagship motor oils. Flip a coin now between the two choices. You can no longer get a majority PAO, over the retail counter choice now. Mobil 1 Extended Performance 0w20 is no longer a “pound the table” bargain for what’s in it now. Even though Mobil increased their mileage rating for Extended Protection from 20,000 to 25,000 miles, is the formulation really upgraded? In fact, almost ALL their previous rated 10,000 mile oils are now 15,000 miles. 15,000 miles now 20,000 miles. Smells like more of a marketing change than a formulation change.
As someone else stated, I would be willing to bet, the GTL in Pennzoil products we are buying on the shelf today, was made long before that plant incident occurred. By the end of the end of the year, afterwards.