Thanks for providing this information. I love seeing older bottles of oil from the recent past.
Yes, it's a very old oil from Pennzoil. Was there a lot of it on the shelves? I haven't seen Pennzane in many years. And sitting on the shelf a W*M today, it'd be over priced.
On the link you provided where is say "Buy It Here", Pennzoil Platunum is what comes up. So, Pennzane isn't even formulated any longer to say the least.
If you can buy it cheap(really cheap) it'd be a good oil for, Oh I don't know, maybe topping off or using in small equipment!
Should you happen to go back to W*M and see the Pennzane again, look to see if there is a date on the bottle.