I just filled up after my first tank with the lift. I got 16.8mpg this tank and had been getting around 16.5mpg before. So no change, really. I, too, notice the Eco light turning off a lot easier now. I'm on 225/75 DuraTracs.

_________________
Current
2012 KK Sport, OME lift, Mopar skids, DuraTracs, Mopar Grille Guard

Previous
98 ZJ Laredo SE 4.0, 2" Skyjacker BB, JKS Quicker Discos, Goodyear Wrangler MT/Rs, K&N FIPK, Kolak cat & back exhaust, Westin Safari bar, KC lights