Here is what I figured out on my trip back from California. I was a little bored.
85MPH Cruise Control = 12.6Gallons = 368Miles = 29MPG
80MPH Cruise Control = 13 Gallons = 379Miles = 29MPG
70MPH Cruise Control = 12.6Gallons = 412Miles = 33MPG (best yet for me)
No AC on, no fan, no lights, all windows closed and bald tires. I just had to do it once to see the best I could do. (no way to live)
Around town I average 20-25MPG or 300Miles to a tank if I drive in a relaxed way.
I found some specs that quote 17MPG in the city and 25MPG highway from the Factory.
I get a 100miles in the 1st 1/4 of the tank and then it goes to pot. Funny Fuel gauge.