I drive 2 different vehicles. One is mine, the other is my Taxi. Both are 2004 models. One has a 3.0 Ltr engine the other has a 3.8. Both have V-6's. One I pound quite hard(drive it like I stole it), the other is treated like a family member(which it is!)
I'm quite sure that most would find it unusual, that the car which has the bigger engine, gets driven well outside the optimum fuel efficiency range and beat on like a rented mule gets the best mileage!