c4004matic

Just returned from a 700 mile highway trip at a constant 65-75mph. The "fat" 550 provided an average 21.7 mpg does it qualify as green given that it gets to 60 in less than 5 seconds hauls seven in style and offers 520lbs of torque to tow essentially anything? Plus gives you a nice massage while climbing a 35% gravel road at the same time? Love this thing