Re: Fuel economy requirements
1. Did you inflate your tires to motorway pressure? The "book" pressure is for offroad / mixed driving. F.e. my Isuzu Denver 2007 manual does ~ 32 mpg at its preferred UK speed of 65 (reported by satnav), inflating the tires 20% above that gets this to 38.5. Similarly, 90 mph on the Autobahn 27 mpg with "book" pressure and 32 mpg with 20% above that. This is with Nexen tractor-like tires which have the most atrocious and fuel economy-unfriendly 4x4 thread you can think of. General Grabbers happily get you to 40mpg+ driving like a granny at 65 (the bloody Isuzu dashboard computer decides that its a fault and reports 40 from there onwards).
The new model adds 5mpg to that (6th gear is quite useful)
2. Is your load area covered? If you do not have a solid lid your aerodynamics go to hell. That is 5mpg at motorway speeds right there.