My '05 2.7L Tucson AWD gets terrible mileage. My old Subaru had a fuse that you could pull out that essentialy turned it into FWD only. Since there are only a couple of months out of the year that I really need AWD, I was wondering if there was a similar ability with the Tucson and, if so, would it make any noticeable difference in the mileage? In the Subaru, I noticed a 2-3 mpg increase. Thanks!