Hang on - are you taking into account the fact that the American gallon is tiny?
A British imperial capacity measure (liquid or dry) is equal to 4.545 liters. The United States liquid unit is equal to 3.785 liters.
Yes we do pay more for our petrol because it's taxed to high heaven (soon this will be something we have worldwide eventually - a carbon credit - one person get's a carbon allocation that they can "produce" in a year or so, or at least that's the plan), but the Americans have a smaller gallon, did you account for that Sharon? Sorry if you did
