4 dollars a gallon? You should be so lucky. It's about 6 dollars a gallon in the UK.
1578
2005
98 cents per gallon
2008 was $3.39, In 1969 gasoline was only $0.35 a gallon. By 1976 it had risen to $0.60 per gallon. And by 1980 - 81 we were shocked as gas prices rose above $1.00 for the first time. In only 12 years gasoline had risen a full dollar from $0.35 to $1.35. That is an increase of 286% in 12 years! good-day !
Prices of gasoline vary from time to time and place to place. Some sort of average was $2 per gallon
The price of regular grade gasoline was about 19.9 cents per gallon in 1960.
The average price of gasoline in 2001 was around $1.64 of a gallon
According to the following website, gas prices appeared to be around $1.95 in 2000: http://flowingdata.com/2007/07/12/gas-prices-over-time-2000-2006/
In 2009, the US national average for a gallon of regular gasoline was $2.35
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 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.