I "knew" it was quaker state b/c it showed up on QS pallets.
Four quarts at $.74/qt and a STP filter for $1.97 and I had an OC for under $5 any day I wanted. This was my first oil change, on my first car, a 1989 mazda 323. I only trusted the 10w30 because we all knew 5w30 would shear, pronto.
Pre-BITOG, I knew the champ made STP filter was great due to the Mini-mopar study