US is quite easy to find; http://www.bts.gov/publications/national_transportation_stat... -> let's say 33 mpg for passenger cars (depends a bit on which vehicle classes you count). EU data is harder; Eurostat doesn't seem to track it (haven't searched very far - I'll ask my friends at the DG Transport if I don't forgot if they track it). http://www.greencarcongress.com/2004/11/average_fuel_co.html seems to suggest 43 mpg, but I don't see where they get their data from (the linked report is MIA). So US cars, in aggregate, use 30% more fuel. Which, intuitively, seems to be about right.
Taking into account gas prices, that still confirms that US citizens don't spend more than Europeans on gas, in absolute numbers, even given their different preference in cars, radically different urban development patterns and fuel purchasing power vis a vis the rest of the world.
Taking into account gas prices, that still confirms that US citizens don't spend more than Europeans on gas, in absolute numbers, even given their different preference in cars, radically different urban development patterns and fuel purchasing power vis a vis the rest of the world.