Originally Posted by Quoydogs
I rebuild a lot of motors. The only oil I can tell someone has used is Pennzoil or Quaker state. Everything on the inside will be varnished yellow and the oil pan,valves and heads will be full of sludge.
I really don't know why I hate it, it makes me all kinds of money.
I won't even put Pennzoil in my lawnmower.
Years back I always heard that Pennzoil was the worst to use. And probably still is the case for their other oils. But Pennzoil Platinum is another story. PP is highly regarded in the industry, I would be very surprised if your varnishing theory applied to it. Now, would I use it in my car? No, but that's more because of my allegiance to Amsoil then my fear of Pennzoil.