My 1 year average (since getting the 33x12.5's) is 15.25 MPG. I do get up to 17 on flat highway stretches. You all probably get slightly better because you have the manual hubs while I am still spinning the full front end and often carrying plenty of cargo. However, there is also a rich smell when it's cold I have noticed. It's not strong, just a faint whiff, but I am guessing that's the computer dumping more gas since the EGR isn't able to recirculate as much exhaust as it expects to...

These are just my guesses anyway. And I am interested/planning to put on manual hubs... just as soon as I can find some and spare cash to get them. Toasty, do you know if the new ones you tested have become generally available yet? Eventually of course, I want to go diesel but that's a long term plan....