Just made a trip up to Bowling Green, KY from Jefferson, GA, 367 miles. Used the AC from Jefferson to Mont Eagle, TN then ran with the windows down. There was just one in the truck and about 300 pounds in the bed. I got 19.91 mpg.
Then on the return trip I ran from BG, KY to Chattanooga with the AC and then from there to Jefferson with the windows down. Same payload but now two in the cab and I got 19.92 mpg.

I used the cruise control set at 74, roughly 2000 rpms, most of the time. There was very little traffic while I was driving so I drove at a very consistent speed.

I've got an '06, 2WD with the 5.4L and tow package

 

i just got a little better than 20 with my truck going from PA to NC...i went a little slower than you and i had 3 other people other than me in the truck with the bed full (about 300 lbs) and the 4 of us were about 650 lbs...so total aroud 1000 lbs...

i was very pleased with it.....i'm very easy on the skinny pedal too...that helps out....i'm usually into OD by 40mph

 

Not to shabby man grats on your good mpg

 

UKkid im from jefferson too i made a trip to orlando a little over 500 miles and had mine set on 72 the whole way and got 21.7 mpg and it was me and my g/f and ALL her stuff for the 5 days we were down there which was probably 300lbs of shoes alone but what im trying to say is i was suprised with the mpg not to bad saying my dads dodge 1500 with the 390ci in it only got 13.6

 

Those numbers for mpg are very good. Good driving=good mpg.

 

I recently just drove 2000+ miles from ohio to new jersey to myrtle beach back to ohio for vaca and i got 19.2 mpg. set cruise on 72 mph and easy on the throttle. BTW i have an 05 Screw FX4 5.4

 

I have never got that kind of milage. Only 16.4 at best. Might have something to do with the fact that I don't have to pay for fuel.

 

Wish my truck got those numbers, but I know why I don't I got a catback put on and I like to hear her run. I don't abuse her, but she sounds so good . My fault!!

 

i have been getting right around the same on my 04 5.4 3.73LS Lariat for the past 3 years.

 

I got 19.1 on my 05 FX4 running 80mph from raliegh nc to atlantic beach nc

 

Do you guys getting this higher mileage have tuners? My 06 SCREW FX4 will run around 3000RPMs at 74mph. I have to stay around 65 to keep RPMs at 2000. I usually get 13-14mph at best

 

I don't have a tuner just a voolant cai, cruise works wonders on my truck

 

All stock except for K&N filter in stock housing. Don't think that adds much at all.

 

Did you adjust your speedo for your taller tires? And 3000 RPM sounds like alot even if you have 3.73 gears... goin to 305's like your gallery says would put you bellow 3.55 i bet

 

Hi wedge88, sorry to see that you are getting low numbers. Are they your highway figures? Do you have any modifications like a lift, bigger tires, or a performance exhaust? I drive a stock 2006 swb screw lariat 4x4 with 5.4L and 3.73 LS rear. The only add on I have is a hard tonneau cover. On a recent trip back from the Poconos mts in PA to Philadelphia, I got 20.5 MPG. This was with the a/c on and a steady cruise set at 60 mph, O/D on and the engine was turning around 1800 rpms. On a trip before, the same destination, I had 19.5 MPG with the air on, except I was driving at 70 MPH most of the way and turning roughly 2000 rpms. Now, when I drive around town, my mileage goes down to 11.5-13 MPG, especially since I have been running the a/c alot as well. I hardly ever turn 3000 rpms unless I am driving with my o/d off and I trying to pass someone or climbing a steep hill. I do not have a chip or a tuner, so I cannot say what kind of effect this will have on these trucks. Good luck getting your truck fixed.