I looked it up and a gallon is 3,785 Liters. In France gazoil is 2.3€ in the Netherlands 2.6€ for example. The Eu average I can find is 2.115€ for gazoil and 1.880€ for SP95. So on average for the EU it is 8.01€ per gallon and 7,12€.

So than convert it to Dollars. Some countries (NL, DE, DK) are even aproaching the 10€ the gallon which is nealy 12$ the gallon.