I personally don’t think Pennzoil was cheapened. I have used PYB 10w30, 10w40 (clearance from family dollar) and PP 10w30 HM. I LIKE THAT THEY ARE USING SOME GTL basestock. Never a issue using either oilI’m really not agreeing or disagreeing, just trying to understand why people think that about Pennzoil. I use it often and have no issues, but I am not cornered to any one brand either.
I have asked others who state similar about Pennzoil, and nobody will provide any sort of answer. Its like a myth began, and folks ran with it. Happens a lot, unfortunately.