I was thinking about getting a dually for a number of reasons.

I was thinking '06 5.9 4x4 with a 6-speed.

Now, the only thing that may stop me is these figures (because the truck would be a DD).

What kind of gas mileage do you Quad Cab Longbed dually owners see?

 

If the reasons are because of the payload it can carry or what you are doing needs a dually, get a dually.

 

13.5 city / 15-16 hwy. Thats the overhead read out so you could probably subtract 1-2 mpg from that figure. Having a 5.9L will get better gas mileage than the 6.7L though. I like my dually but I don't haul all that much anymore and if you are not hauling then you are paying for extra tires and getting less mpgs than a SRW. I would like to go to a SRW longbed since i don't pull as much

 

best I ever got was around 17.5 all highway empty and running about 60mph. Most of the time I averaged in the low 16's mixed highway/ small town traffic. That's empty with a smarty on various tunes. stock tires.

jeff.

 

Mine's an 05 with the 5.9 and a 6sp, but I get 13-14 in town and anywhere from 14-19 on the highway, depending on my right foot. Now that I added a Smarty, that's up a few points.

Like somebody else said... if you NEED a dually, get it... if you don't, trust me, it'll just be a PITA.

Rob

 

Hand figured, at about 3000 miles on the truck was 15.99, about 75/25 hwy/city driving. On the freeway, 65mph or less.

By the way this may go up for sale.

 

Currently have 14K and all the values I have listed are from the overhead. I have definitely noticed an increase in MPG as the mileage increases. Initially, I never got out of the 13's in city and 14's on the hwy. Now I have seen as high as the 18's on the hwy and 14's in city. What really makes the difference on my hwy mileage is speed and headwind. I can consistently get in the 17's and 18's if I am running around 67 or 68 MPH, providing there is no headwind or a slight tailwind. If I am bucking a 15/20 MPH headwind, my mileage drops to the 14's and 15's. Increasing my MPH to 75 will cause a drop to the mid 14s. Obviously all of this depends on terrain. Since I live in south Texas, most of my driving is through pretty flat country. If I could ever teach myself to reduce my acceleration from a stop, I am sure I would get even better in city. But alas, that appears to be an impossibility. Maybe when diesel gets to $10/gallon, I will learn.

 

I have a 13k miles on mine now and after the lift and 35's I am getting 12 mpg overall almost every tank. I dont think this is too terrible and cant complain because I chose to trash my mileage for the lift and tires.

 

My truck is doing very good. I just got back from a 600 mile trip, and my overhead said 22.6 MPG. This was all highway driving. My hand calculation was 22.1 MPG. My MPH was 60-65 on level ground. I now have 50,000 miles on it and love driving it everyday. The truck is all stock, except for my Sig.

 

My 03 gets about 16MPG city, no highway driving around here. Milage went up about 1MPG with smarty sw3. Haven't really tried other settings for better milage on the truck.

 

When running empty i usually get 17-19...thats mixed hwy and city...i hand calc and record every tank. I dont think ive gotten below 17 mpg unloaded since i added the smarty jr.

 

I drive 75 MPH and consistently get 15.5 to 16.5 hand calculated. Truck is bone stock.