I have been getting anywhere from 13.5 to 16.5, but me and my wife use it just to haul the kids around... It varies based on the driving type, city vs. highway... MPG is typically based on a per-user driving habits, which factors many different variables... But I knew that when I bought the damn thing! And stickers on estimated MPG I feel are always best case scenario's and/or guess-timates!
'05 Armada LE 4x4 - Red Brawn (AEM Brute Force Intake, Active Tuning Ground Kit "RED", Gibson Cat-Back, AirRaid TBS, Nitto TerraGrappler 325/60-18)