Alright I just drove to Pennsylvania from Michigan over the four day weekend. I was on the freeway for 99% of the trip and got a whole 16.76 MPG there and 16.71 MPG back. The sick thing is on the fillup right before I left I got 17.27 MPG and it was mostly city driving. Granted the average speed was about 75-80 MPH with the cruise control on almost the entire trip but is it just me or does that seem a bit low for highway mileage? I've got a 4.0L, automatic trans and 4.10 gears and rolling on 31's.

 

That sounds about right for the average speed you were running. I didnt get good mileage at all when above 75 mph.

 

yea once you go above 55-60 it starts to go down again... 60 is the ideal speed i think for time effecncy, wind resistance and rpms

 

Ya especiallly since you have the 4:10 rear end im sure it was tachin over 3 so you definately werent savin gas, and hey i dont even get 17!

 

sounds about right, last time i checked my mpg it was like 10.4.... needless to say i stopped checking it for now.

 

i am still getting horrable i went to te Patriots game yesterday vs the dolphins and i drove about 135mi total and i went threw 3/4 of a tank and was going between 80-90mph only because i was getting passed by old gramas and i got mad, i thisk that pritty bad but id love to have ur mialage :) wana swap trucks!!

 

you know whats sad lol...i just drove my buddy's super duty deisel down to tenn from mich we cruised most time time at 80-90mph was the normal. with jumping up to 100mph sometimes for about 10 mile stretches. we got an adverage of 17mpg.... man i love it...and thats running on 35" tall tires LOL...

 

I got about 14.7 last time I checked mine.

 

if i stick to 60mph i get 310 miles per tank(16 gallons to fill up +4 in the tank) so im getting around 20mpg with a full truck rack ,loaded down with tools with a 4.0L engine....................im doing something right!

 

What year is yours?^^

 

I get a constant 17, unless I drive like a maniac or go offroading. Doesn't matter if I'm doing stop-n-go city driving or highway miles, it's all the same to my truck. Of course that's all about to change after i'm lifted.. D'oh!

 

2001,with 112,000 on the clock

 

^Got ya.
Done some driving haven't ya?

 

Oh, OK. I figured driving at about 80 was going to kill the mileage but I didin't think it would be that bad. Oh well, I guess I am pushing a brick through the air. As for the guy who said he got about 20 mpg, well I got 310.2 miles when I filled up, of course I put 18.561 gallons in mine

 

im only getting 17 in my 3.0 and i dont drive very fast, ususually like 50 on around town cuz i hit OD at like 55 then let it drop, and i havent been on the highway atall latly because i hate drving with my snow tires....

 

ha.

i have never gotten 15mpg in my truck, since it was stock.

19.5 gallon tank, right?

stock, the best i got was 270 miles to the tank. that's almost 14mpg.

now, with my roofrack, grille guard, toolbox, 32's, 15x8's, etc...

i get 200 miles out of a tank, on the highway. adjust the 9.5% or whatever, for my tires being off. 219 miles.

219/19.5 - 11

let's assume i only let my tank get down to 18 gallons gone. 12

just around town, it's not any better. prolly a couple less...

def. not fuel efficient.

 

I believe I am going to be looking at gallons per mile in my truck

 

i am guessing you never regeared at all. 4.10's would be a smart idear

 

I average between 16-18mpg. This depends on how faster I drive. 33x12.50s, 3.0L, auto, 4.10gears.

 

 

in the nice snow and everything here with 4 wheel on most the time i get about 10-11. After 70 on the highway my gas mileage takes a dive. If I keep it under 70 I usually get over 18. My brother claims he got 22.5 going 45 the entire time to our land (just when it goes into O/D).

 

i went from tally to ft. lauderdale with my friends mattress strapped to my bed Tuesday, and got 20 MPG going between 80 - 85MPH with the 87 mileage program on. Coming back, i averaged 24 MPG between 85 - 90MPH following a caravan back to Jacksonville and then back into town...

round trip was about 1200 miles so i did pretty good with the mileage program on

 

The last time I checked my mileage on a long trip... I was getting 16-18 MPG at 75 mph with 265s and 4.10s. Recently installed the Underdrive pulley, but have not been able to check what this has done for the MPG.

OR 4x4

 

you may want to add that tonno cover soon. I put mine on this summer and I can't tell you how much it changed the way my truck perfoms. You notice right away going up hills into a stiff wind that there is no more drag.

 

I'm getting 16.5 with auto, 31s, 4.10, and tonneau.
18 on roadtrips. I get slightly better mpg when I buy gas outside of los angeles SCAQMD zones.