I addressed this, primarily to Johnny, back in the dino. thread. It got lost in the drift. Still curious as to whether there is such a thing as "Pennsylvania oil" anymore. Especially since PZ/QS moved to Texas... Original Post: I may have posted something similar before, but how does PZ/QS relate to the old mystique of "Pennsylvania" oils. This seems to have had both positive and negative ramifications. When I was a kid in South Dakota in the fifties, we were always taught that Pennsylvania oils were superior in lubricating ability. I've also heard the bit about Quaker State (especially) plugging things up because of high paraffin. Are there any such things as "Pennsylvania" oils anymore? I imagine your base stocks come from a wide variety of places since the corporation is now Texas based.