you are very lucky. yesterday, 1 liter of gas (Super, 96 octane) cost 1.359€. Taking into account the current dollar value of 1€ = 1.4691$, this means that gas is damn 7.558$ per gallon here.
something you might find worth knowing: 73% of this price is taxes, which means I'd only pay 2.428$ per gallon (VAT included) if my country would keep their fingers out of the fuel prices.