so you think i should do away with penzoil?

 

Im not a professional in the least but im going by when i worked in the salvage business. Tons of the cars that had recipes for penzoil changes or found empty penzoil containers were sludged up horribly. I was talking to a buddy at my old work that all he does is also tear down engines and he said the same exact same thing as I. I mean i personally wouldnt but people do what they want to do. The substance is not really sludge but a waxy buildup that sticks to everything. My opinion is i wont run it but i know someone will fight with me saying they have a million miles on "insert car here" and all they have ran is penzoil.