The US average in 1981 was $1.19 per gallon. That would be about $3.07 per gallon in today's dollars (2014).
In 1981, the US national average price of a gallon of regular unleaded gasoline was $1.38, which was a lot for gasoline in 1981. That is equal to about $3.31 per gallon in 2010 dollars.
The price of a gallon of gas in 1990 varied from $1.10 to $1.30
the average price per gallon of gas in 1988 was $1.08
The price per gallon of gasoline in 1914 was about $.17/gallon.
$2.22
the average gas price for a gallon was $1.85 in the year of 1994.
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
About .20/Gallon
As of June 9, 2010, the average price of a gallon of regular gas in Missouri is $2.518
$ .99 cents a gallon
20 Cents a Gallon