Depending on what you do, or where you live, the E Locker could be your best friend. Remember, the E Locker is only engaged in 4Lo and not in 4Hi. As far as decreased gas mileage, that is determined by whether or not you go with the Big Tow package 4x4 or the standard package 4x4. The Big Tow has a lower gear ratio so it is going to have a few less mpgs. Many member here say (and I agree because I have it) to go with the BT package if given the choice. I think it's worth it just to get the BT mirrors :lol:. Also, do you plan on towing much with the truck? If you are not going to tow/haul anything, then there is no need for the BT package.2007 TITAN LE said: