Originally Posted By: stchman
Back when I worked for some quick lubes back in the early 90s, we called Pennzoil "Pennzwax", or "Pennzsludge" as some engines were pretty sludgy that used Pennzoil.
I gather they have improved their oil since then.
Pennzoil and Quaker State switched away from using Pennsylvania paraffin base oil stocks decades ago. Modern refining techniques and stricter standards make the original base stock point moot anyway.
Back when I worked for some quick lubes back in the early 90s, we called Pennzoil "Pennzwax", or "Pennzsludge" as some engines were pretty sludgy that used Pennzoil.
I gather they have improved their oil since then.
Pennzoil and Quaker State switched away from using Pennsylvania paraffin base oil stocks decades ago. Modern refining techniques and stricter standards make the original base stock point moot anyway.