That hasn`t been a thing in a long time. Its just as good of oil as most all the others out there in the same class of oils.Quaker State Oil is still on the market
having flash back from the 70's taking quaker state motors apart and all the caked on sluge in the motors ..
Hell! that sure beats the shit out of the $120 dollar full synthetic oil change and you really don’t even know what the hell they put in your engine.