Penzoil

back in the mid 70s i did some testing for car craft mag. penzoil came in #2 after castrol. but for my money their both tops in my book!
70 road runner 6 pack, bone stock 1973 national record holder et & mph. owner (vince simone) builder (my father tom chamberlin & my self al cmamberlin). set records off the gas at 1000 ft mark. cars mag champ same year.