Below, in dollars, are the amounts levied on a gallon of gasoline in various European countries. The US by far has the smallest level of taxation...This is why the price of gas in Europe is more expensive, not because the gasoline itself is more costly...The US figure is an average. The Federal gas tax is $.20 and each state adds their own amount.
United Kingdom $4.47
United States $.39
Data from HERE (HT: Carpe Diem)