In the U.S., the national average for gasoline is currently $2.70 per US gallon, but that varies widely by region, from as little as $2.45/gallon to as much as $3.25/gallon.
Converting that into euros/liter, we pay about 1.86 euros/gallon. Converting that into liters, we pay about 0.48 euros/liter.
And for those of us in the US - at Italian prices, we'd be paying about $8.16/gallon.