Brad-Penn has a high-zinc oil they market for the classic/muscle car market. It's green.
I switched to Valvoline a few years ago.
We used Pennzoil and Rotella for years with no trouble, and some Wolf's Head, too, but I got some valvoline on my fingers one day and couldn't turn the nut on a new, clean, 1/2 inch bolt. NEVER had that trouble with any other oils.
Also used to be able to smell Pennzoil, Wolf's head, Hy-tran, Ford 134, and Rotella and tell you which I had.
Valvoline also bottles NAPA's oil for them.