Boy, I just filled my first tank and....well...I got 33.1 via the computer and 32.3 via my head. I went 487 miles and put in 15.109 gallons. I am a little bummed about that. I am having an extremely hard time keeping it from using the ICE and going to 20 or below mpg....it really kills me that I cannot seem to figure out how to drive this thing or how to accelerate fast than death without using the ICE. It takes 30 seconds or more to go from 0 - 30 and it is hard to get it to keep a speed or accelerate after that....I'll see how this tank goes.