The US average in 1931 was 17 cents per gallon. That would be about $2.63 per gallon in today's dollars (2014).
the average price per gallon of gas in 1988 was $1.08
In 2005, the average price per gallon of regular unleaded gas was $2.30
In 1997, the average price per gallon of regular unleaded gas was $1.23
In 2001, the average price per gallon of regular unleaded gas was $1.46
Around 30 cents per gallon.
$1.03 per gallon
In 1943, the price of gas was about 10 cents per gallon.
In 1995 the average price of gas per gallon was $1.11. Oil was an average of $16.75 per barrel for the year.
The US national average retail gasoline price in 1976 was $0.57 cents per gallon. This equates to about $2.39 per gallon in 2015 dollars.
In 2007, the average price per gallon of gas in the United States was around $2.80.
20 cents per gallon in 1930. That would be about $2.81 per gallon in 2014.