Memory lane...
As a young whippersnapper one gas war in Hillsboro was at .19. Cheapest I can remember.
Conoco I worked at had 3 pumps & was full service. We had 3 tanks - premium, unleaded, and diesel. Diesel pump was stand alone. The other 2 pumps had 4 octanes of gas to dispense - 100% premium, Super (blend with more premium that unleaded), Regular (blend with more unleaded than premium), and Unleaded. The Unleaded was cheap gas & most of the 4 years I worked there the price was about .27. Last year it was in the .50 range & drivers were pissed. Price spread from Premium to Unleaded was maybe a dime.
All high performance cars used Premium & some used Super. We sold a lot of Regular, the Unleaded stuff was not so great. Had to wear a uniform with a hat. Wash windows, check oil, check tires - standard stuff. We gave away all sorts of freebies for fillups - bottle openers, pens, in car litter bags. I made $1.35/hour at the end of my last year. It was a different world.