08 F-250 CC 4x4 SWR 3.73's.
Computer has not dropped below 14.1. I have almost 300 miles still 1/2 tank left and about 30% is city driving. On highway was getting almost 17 (16.9) w/ computer. Have not refilled yet so can't report calculated mileage. But pleased with computer mileage so far. I am keeping my foot off of accelerator if you know what i mean.