Hell, I run sythentic, have new plugs and a clean TB, air pressure in tires is good and new air filters, I but only 100% fuel and no 90/10 blend and I get about 11-12 on average

 

Thats nothing to brag about... I keep my foot firmly planted on the gas peddle and I'm still getting 15.9mpgs...

For the EGR valve, I replaced mine over the weekend, wasn't hard and it smoothed out my idle quite a bit. Had to buy it from the dealer though, everywhere I went did not have one in stock, and when I ordered one from checker they couldn't get the order filled.

It may also have to do with the weather changing. How cold is it up there now? I know when we start having colder weather here my mpg drops about 1mpg or so.

 

wasnt bragging man i know its bad but its a truck not a prius...

 

I had a 2005 Ford F150 FX4 and that thing was no better than my 2002 Ram 5.9 liter---and the RAM has real power at the boat ramp, lots of room, more power plugs, more beer/cup holders and rides better.

The Ford got 12/13 around town and 9 pulling my boat to Trampa and the Keys. RAM 5.9 (also a 4X4) gets same mileage and is much better truck !!!

 

i get on average 14 mpg in my truck so im not complaining yet.....and thats reg traffic in tampa bay.....not sitting traffic either....

 

It seems half of us get decent mileage and the other half gets terrible. I just took a 400 mile road trip this weekend and with cruise on at 70 i barely got 16 mpg on the highway and I dont have **** on my truck that would hurt mpg's

 

I was averaging around 11-12mpg when I first got my truck, after the first few mods that would affect my mpg it went to 12-13 while I ran a few tanks of 89. . .I've now put a tank of 87 back in it and am running the 87 tune with my cortex and love how it drives so far, just past 3/4 tank so I'll repost once I refill. I'm hoping for at least 13-14 ^_^ haha, I can dream can't I ?

I haven't changed plugs, cleaned tb, or replaced/cleaned the egr valve. Still running stock P265/70/17 wrangler A/T tires(psi usually around 37-38). Probably because I just turned over 6500 mi. so far . . . I'll check my TB out this weekend though, just for kicks.

Oh this is with about 70/30 street/highway driving so . . . yeah.

 

I thought we got better mpg with the 91 tune than the 87???

 

I always got better mpg with the 91 tune over the 87 by a fairly large amount if I remember correctly.

 

thats probably part of it. your on that tune and have smaller tires than i do...