The average annual price of gasoline has fluctuated greatly over the past several decades, but when adjusted for inflation (constant dollars), the price of gasoline in 2019 was only nine cents higher than in 1929, according to the US Department of Energy (DOE).
The graph below shows the effect of the oil embargo in the early 1980s. 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 both current and constant dollars but began a steep decline thereafter.
Note: Retail price includes Federal and State Taxes. Price is for Regular Leaded Gasoline until 1990 and for Regular Unleaded Gasoline thereafter. Constant dollar values were adjusted by the Gross Domestic Product Implicit Price Deflator.