One can achieve the optimum posted gas mileage if the "Adaptive Shift Control" feature is made used of. Here's some pointers:
a) when u first drive on the automatic mode check the tachometer make sure shifting between gears does not exceed 2K rpm (this is Soft-Driving)
B) Anticipate your Stop , City driving ,if possible, should be at least @ 40MPH at this speed the RPM should be less than 1500 RPM.
Lastly, avoid Lead-footed driving. Hard driving makes shifting between gears at higher RPM bcoz you are telling the computer to give more horsepower therefore more RPM equals more gas!!!! right?
In my case my average Mileage at t a 40/60% city/hiway driving is no less than 20 MPG could be a bit more when I have no passengers. To me tthat is 30% better than my previous 4 liter Grand Cherokee. not to mention the tamed and car-like driving. This Endeavor truly gives my money's worth!!!