wow these are only getting 21 to 23?
the 5.4 in my e350 ext.gets 17 to 18 . and with some tuning and exhaust work i think i can 20 mpg out of it.... and will pull a trailer down the road. and its not a dog. we use it for camping and bike commuting to .
or what ever. it will handle a gs in it with a windshield off or down...
you sure it only gets 21 to 23?
beside head room i think the e series is better. and much cheaper. i wanted one but glad i bought what i bought.