$10
How much 'does' a gallon of unleaded gas cost? The answer to this question varies depending on where you live. The average cost for a regular unleaded gallon of gasoline in the USA as of 2-13-2011 is $3.523. For the west coast the average is $3.727 and for the east coast $3.612. eia.gov/petroleum/gasdiesel
The average price of a gallon of regular unleaded gasoline in 2000 was $1.51
The average price of a gallon of regular unleaded gasoline in 1998 was $1.06
The average price of a gallon of regular unleaded gasoline in 1999 was $1.17
The average price of a gallon of regular unleaded gasoline in 1977 was $.66
In 2005, the average price per gallon of regular unleaded gas was $2.30
In 2007, the average price per gallon of regular unleaded gas was $2.80
In 2001, the average price per gallon of regular unleaded gas was $1.46
In 2008, the average price per gallon of regular unleaded gas was $3.27
In 1996, the average price per gallon of regular unleaded gas was $1.23
In 1985, the average price per gallon of regular unleaded gas was $1.20 .