I have a 08 Jk 4 door with 35" tires and 3.73 gears. I have ZERO power and get 8 - 9mpg. Most of my driving is street with an occasional logging road, nothing serious. With this said I am looking to get better gas milage and power on the street. Can someone out there tell me their mpgs with 4.56s and 4.88s and if it helped the power out significantly. $1600.00 for the regear I was not expecting to fork up so I want to be sure on this choice cause the 35s were not one of my better buys. Please no smart ass remarks I know 35s reduce power and mpgs.