I had a Toyota Colorado until about 18 months ago and had baught it after a bad experience with a Discovery.
My experience was that you would need a long run and a light foot to get anything like 28mpg.
around town it was nearer to 22-23mpg and it was nowhere near as good (fuel consumption) as the Disco (admittedly manual) where I could get 32- 36 on a run.
To my mind the auto box on the locked up the torque converter at far too high a speed and unlocked it too early.
Sadly I could not afford to run it at that mpg and I lost a lot of money in depreciation.