1 gallon of gas is equal to approximately 3.785411784 liters.
In 1995, the US national average price of a gallon of regular gasoline was $1.15. That is equal to about $1.65 per gallon in 2010 dollars.
In 2007, the US national average price of a gallon of regular gasoline was $2.80. That is equal to about $2.94 per gallon in 2010 dollars.
In January 2002, the US national average price of a gallon of regular gasoline was $1.139 - equal to about $1.38 per gallon in 2010 dollars.
In 1994, the US national average price of a gallon of regular gasoline was $1.11 - equivalent to about $1.63 per gallon in 2010.
In 2000, the US national average price of a gallon of regular gasoline was $1.51 - equal to about $1.91 per gallon in 2010 dollars.
In January 1996, the US national average price of a gallon of regular gasoline was $1.129. That is equal to about $1.57 per gallon in 2010 dollars.
In 1970, the US national average price of a gallon of regular gasoline was 36 cents. That is equal to about $2.02 per gallon in 2010 dollars.
In 1972, the US national average price of a gallon of regular gasoline was 36 cents. That is equal to about $1.88 per gallon in 2010 dollars.
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.
In 1978, the US national average price of a gallon of regular unleaded gasoline was 67 cents. That is equal to about $2.24 per gallon in 2010 dollars. Also, you could still buy leaded gasoline in 1978, which was 63 cents per gallon.
In 1953, the national average price of a gallon of regular gasoline was 29 cents. That is equal to about $2.37 per gallon in 2010 dollars.