Dually MPG???
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Senior User
Joined: Jul 2010
Posts: 492
Likes: 2
Dually MPG???
Ok.. I have read all these post of guys getting 20MPG ... I have to think that there is something wrong with my truck... At 65MPH I'm lucky if I see 14-14.8 MPG steady cruise on highway... In the city 10MPG .... At any highway speed over 75MPH the mileage drops into the 12MPG range.....Is this normal.. I run Diesel kleen in every tank full... keep it well maintained... Its a 2005 F350 ,DRW(4.10) ,Auto, CC with a leer high cap... These are MPG unloaded...
Thoughts??
Thoughts??
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
NO NO NO!
I am getting 20mpg with a E-350 (1,000 to 1,500lbs payload in it all the time), with a single rear wheel.
The big secrets:
a) cetane boost (it actually works if you have low cetane fuel)
b) low / moderate speeds to cut wind resistance (50mph)
c) light foot most of the time (except when I am doing Italian tuneup)
d) trade it for a much smaller rig if you don't need the capacity
e) quit using winter diesel as soon as possible --- it is 10% less energy.
f) highest tire pressure recommended by tire manufacturer (makes for rough ride)
g) everything working properly - no alignment, brake drag, badly tuned engine, etc.
Post Fiend
Joined: Nov 2006
Posts: 6,648
Likes: 1
From: CT
I get about 11 around town and can get about 13-14mpg on the highway.
My truck has 4.10's and a daily weight of 12,000 lbs.
You might want to try getting your FICM tuned ( I have not yet ).
Some folks see a 1-2mpg gain.
My truck has 4.10's and a daily weight of 12,000 lbs.
You might want to try getting your FICM tuned ( I have not yet ).
Some folks see a 1-2mpg gain.
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Elder User
Joined: Mar 2005
Posts: 545
Likes: 0
From: Denison, Tx
Ok.. I have read all these post of guys getting 20MPG ... I have to think that there is something wrong with my truck... At 65MPH I'm lucky if I see 14-14.8 MPG steady cruise on highway... In the city 10MPG .... At any highway speed over 75MPH the mileage drops into the 12MPG range.....Is this normal.. I run Diesel kleen in every tank full... keep it well maintained... Its a 2005 F350 ,DRW(4.10) ,Auto, CC with a leer high cap... These are MPG unloaded...
Thoughts??
Thoughts??
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New User
Joined: Dec 2009
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Yeap, I get about the same. I have 06 crew cab DRW with 4.10 rear.
Tuned
Joined: Apr 2007
Posts: 333
Likes: 2
From: NJ
With a 4.10 rear , On the highway keeping it under 2000 rpm's (not towing) I usually see between 16.5 to 18.5 mpg . While towing our 13k 5th wheel it varies to 10.5 to 12 mpg.
Unloaded city averages 14 to 15.5.
Unloaded city averages 14 to 15.5.
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
You also don't know if they are calculating their MPG like they should.
I have never gotten within the average of what people have gotten on any of my vehicles. Sometimes that's just the way that it is. If you are concerned about MPG, try changing your driving habits as best that you can and try to eeck that much more about out of it.
Just don't get concern about other people's MPG as they might be doing with or not dealing with variables that may or may not apply to you. Nothing you can do about that.
Senior User
Joined: Jul 2004
Posts: 375
Likes: 0
From: W. Philly Burbs
I once got approximately 18mpg on I-95 northbound from Florida back to Pa. I stopped just across the border of South Carolina in North Carolina, and filled the filler neck up to the top.
I-95 was choked but moving, thank god. I drove 675 nonstop miles, and when I filled the tank up after a few hours rest, I filled it up completely, to the tune of 37 gallons.
Yes, I cut it very short, but after being on the road for 14 hours all I wanted to do was get home.
And, if you can believe it or not, I once put in a hair over 39 gallons
.....I NEVER did that again. I like my injectors to much 
But I average daily, in town and highway, about 12 MPG. Been the same way ever since I bought the truck brand new. Oh, and I do have a heavy foot, and with it being winter my mileage always hurts from more idling and winter fuel.
But as Tex says, your mileage may vary, but based on my experience, you are right in the ballpark.
I-95 was choked but moving, thank god. I drove 675 nonstop miles, and when I filled the tank up after a few hours rest, I filled it up completely, to the tune of 37 gallons.
Yes, I cut it very short, but after being on the road for 14 hours all I wanted to do was get home. And, if you can believe it or not, I once put in a hair over 39 gallons
.....I NEVER did that again. I like my injectors to much But I average daily, in town and highway, about 12 MPG. Been the same way ever since I bought the truck brand new. Oh, and I do have a heavy foot, and with it being winter my mileage always hurts from more idling and winter fuel.
But as Tex says, your mileage may vary, but based on my experience, you are right in the ballpark.
Senior User
Joined: Dec 2010
Posts: 337
Likes: 0
In kansas city, winter time, mainly city driving but also hiway 06 cc drw 4x4 I'm getting 12.5. But when did long hiway trip was getting 13.5. But course that's reading dash. Buddy told me grill cover would def help with mileage during winter. I made post bout regearing to 3.73 but was told it would help in a sense. But if anyone has switched gears be nice to hear your opinion.
