When the 1973 embargo happened I remember 65 cents a GALLON, not liter, and I think it was closer to 40-48 cents for higher grades prior to that, but in all honesty I was only SEVEN.
I remember because my dad was a mechanic at an Amoco (a former UTOCO way back in the days) station in Nampa, Idaho...and because the higher prices marked the first time people really got stingy about REPAIRS as well. DOUBLE WHAMMY.
Self-service pumps did take some of the sting out of it but there was a STINKER STATION a block down and they were the low cost gas kings in the state back then ('Fearless' Farris, the founder, was so famous for low gas prices that the legend says one dealer called him a 'Stinker' and the name of the company was born, along with it's skunk with a red clown nose).
It wasn't as if the gas was bad, it's been Sinclair (a Salt Lake City, Utah company) gas for many, many years. There are many Sinclair stations not owned by Stinker in our valley as well. And the two main companies that formed the Amoco brand were Standard Oil (Illinois) and American Oil Co. (American Oil bought out the Sinclair Pipeline interests, which later was spun off as Service Pipeline Company), and a related company, Stanolind Oil Company, invented hydraulic fracturing that is mighty important to a few people you might know...