Wolf's Head Oil?

The oil that goes in the Wolfs Head cans may come from Pennzoil, but it may or may not have the same quality of additive packages. Better if you use a "first tier" oil (Shell, Mobil, Amoco, etc.).

It's Pennzoil in the Wolf's Head can. I live near where the Pennzoil and Wolf's Head refineries were, Oil City, PA. After the Wolf's Head refinery shut down Pennzoil pumped their oil down the road about four miles and filled the cans after that. Now they are both gone and Pennzoil moved to Texas. So if you like Pennzoil you should be good with Wolf's Head. I haven't seen it sold here for a long time.