What kinda of mileage are yall making on the 5.9.

 

I've averaged 15 MPG with mine, but i am sure the lift, tires, and mostly city driving have driven my mileage down. Before the lift and tires I was able to get a tad over 18 MPG once on a long trip driving 63 MPH.

 

05 model 2WD and I get an honest 22.5 hand calculated on a trip not towing anything running 60/65 mph. Local running around I get 18. Pulling a 24ft low profile 5th wheel I get 16/17

Speed is everything when it comes to mpg!!!!!!!!

 

My last 2 tanks running empty have been 20.9 and 21.5 mpg hand calculated.
That is the best I can do. Overhead showed 22.5 or so.

To get that mileage with mine requires careful driving, tires at 75+PSI and coasting when i can. I only exceed 65 when coasting down a 6%

A couple of years ago we made a 3600 mile road trip with our Lance slide in and averaged 15.2 mpg hand calculated. Same strategy as above.

Jim B

 

My 2007 Q/cab 3500 4x4, 3.73 gears, 48re, stock tires.

Overhead reads as follows:

Empty on highway = 18.3 mpg

Empty in town = 15.6 mpg

Loaded pulling 10,000 lbs Desert Fox = 11.2 mpg

 

About 20-21mpg running 70mph. 16-17mpg around town.

MikeyB

 

15 empty town
20 empty highway

 

About 19 in the city, not much better on the highway.

 

16.8 tops on overhead. 2006 4x4 3500 MEGA CAB. I bought this truck because I was told 20 plus. What a let down. Usually get about 14.5 babying it.

 

If you were told 20+ i think they were lying to you. Had a buddy that went to the Ford dealership to purchase a 6.4 and they are claiming 18-20? They will say anything to sell the truck, i can't stand that they are allowed to do this since these trucks are not required to post any mileage information...

 

I have an 06 2500 mega and get 14 to 16 city and 19 to 22 high way empty but I baby it set the curse at 64 and let it roll

 

The overhead is not accurate, and gets worse with mods. Mine says I am getting 23 but my calculator says 15

 

14.5 city, 18 hwy

 

Back and forth to work, about 5 miles at 70-55 MPH and about 5 miles at 45-30 MPH through town, I am averaging about 18-18.5 MPG

Haven't gotten a chance to check hwy mileage since Smarty Junior and Scotty III

 

I just bought an 06 mega cab dually with a diablo on economy stage the rest stock and i am getting 13.1 driving like an old man i was thinking there might be something wrong i noticed that when i am going down a hill and i let off the throttle it acts like it is choking so i am going to change the fuel filter and see if that is what is wrong with it i will post back thanks!!!! If yall can think of any other thing that would make it do that please let me know. Thanks!!