My uncle used to swear by Wolf's Head. It's all he ever used, and back in the fifties and sixties he used to rack up impressive mileage (for the time) on his engines, we're talking 200k + back when the average life-span of a motor was less than 100k.
Here, it was marketed as the "cheap" oil in the Pennzoil/QS family. I quit seeing it around about twenty years ago but I used to run it quite a bit, even after I'd shied away from Pennzoil/QS.