I have ED QC Outdoorsman with a 3.92. It's only my second tank, but I was 23 on the first tank 50/50 driving. So far on the second tank I am 18 with 100% city driving. Trying to keep my head up since I was expecting more given what everyone else is seeing. Can't really blame it on 3.92 since the truck seems to want to upshift really before it should. Given the 8 speed, the 3.92 should really only be different on the highway in 8th gear. I live in Northern CA, so I am usually either going up a hill or going down.