I wonder in cases of these 'problem engines' how long the owners have gone between oil/filter changes? I would wager most see 10K, 15K, 20K advertised on the oil bottles and figure they can fill and forget. I know folks like that, and nothing I say seems to motivate them otherwise. I feel sorry for the engines in their cars.
Meanwhile, the two 2016 vintage 3.6 VVT Pentastars in our fold get schedule of 4,000 mile oil/filter changes with Pennzoil 5W30 Platinum (or Ultra if it shows up around here).
My wife tends to do a LOT of short hop, stop & go driving in miserable traffic, 10 miles or less usually. In that case, I'll reduce the OCI to 3,000 miles. When she goes on road trips to see her relatives in Michiganistan, the OCI gets extended accordingly.
Call it wasting money, but as my grandfather used to say: quality oil is the cheapest thing you can put in your cars engines.