What happened to gasoline in the mid 1970s?

MoparLeo said

104 octane leaded after 1980 ?? Local gas station ? What state, wasn't California.

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You could still get 88 octane leaded gas until the early 90s in parts of California. I lived in Carmichael and a new ARCO station had 88 leaded, 87 unleaded and 92 Super unleaded. Later they reduced the 92 to 91.