More than half the total is trucks, really?
[Researches}
Dang:
Auto Sales - Markets Data Center - WSJ.com
But I think we can safely say, certainly in this crowd, that truckishness doesn't necessitate fuel thirst. Mine isn't a great example but I do well in excess of the vehicle's stated rating and indeed the above-cited average, and haven't made a single physical modification to the vehicle aside from pumping up the tires.
The larger trucks on this forum also stand against the perceived thirstiness of trucks.