I find it all kind of humorous now. I recognize the nature of this forum is to obsess about engine oils and obsess we do. But then I continually remind myself of the million mile Chevy Silverado running nothing but quick lube bulk Pennzoil 10W-30. Unless it's a case of a major design flaw, regular oil changes with name brand motor oil, even conventional; the engine will out last the vehicle in many cases.
However, it seems with VRP, we are seeing real world proven results of an oil that both restores and protects engines against compression loss, blow-by and overall engine cleanliness.
That said, I don't see any point of switching away from VRP after switching to it. In that case obsession only makes sense.
Sources cited:
https://www.brakeandfrontend.com/pennzoil-honors-driver-of-million-mile-truck/