from what i have seen and from the experience of others on this forum, it seems that the adventure model gets a little less mpg than the base or lux model.
i am sure the A/T treads and larger tire size are one factor.
maybe the different gears are a factor as well, i am not an expert.
what i do know is that if you are worried about fuel economy, just talk with anybody who has upgraded to 35" M/T's and they will assure you that your fuel efficiency will be further reduced.
to put it in perspective, i just think about the long hours i spend fueling the tiara at the fuel dock - it burns around 2 gallons to the mile! (hope the greenies don't see this)
then the h3 mileage doesn't seem so bad!
