My father bought an 05 Track model when they came out. That is the 300hp version of the "rev-up" VQ35. Mileage is about what was posted above. 17-18mpg in mixed driving. The trannies had synchro problems early on and were updated continually. I want to say that the 05 Track has the 5th revision of parts. Nissan was swapping out entire units in 03 and 04 due to synchro problems. Honestly though, I drove a used 03 6spd, and it was jsut a little notchy going in to 3rd.