$5.29 (above, California) adjusts (deflates) to $1.60 a gallon in July, 1980. Did gas ever get to $1.60 in California in 1980?
This, from 2015, is interesting:
https://www.energy.gov/eere/vehicles...rice-1929-2015
"When adjusted for inflation, the average annual price of gasoline has fluctuated greatly, and has recently experienced sharp increases and decreases. The effect of the U.S. embargo of oil from Iran can be seen in the early 1980's with the price of gasoline peaking in 1982. From 2002 to 2008 the price of gasoline rose substantially, but then fell sharply in 2009 during the economic recession. In 2012, prices reached the highest level in the eighty-year series in both current and constant dollars, but began a steep decline thereafter. In constant dollar terms, the price of gasoline in 2015 was only seven cents higher than in 1929."