RV.Net Open Roads Forum: Hey 5.9 Cummins owners, what is your highway MPG?

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Help and Support  |  Contact

Search:   Advanced Search

Search only in Tow Vehicles

Open Roads Forum  >  Tow Vehicles

 > Hey 5.9 Cummins owners, what is your highway MPG?

This Topic Is Closed  |  Print Topic  |  Post New Topic  | 
Page of 4  
Prev  |  Next
Sponsored By:
Dr Gonzo

Surrey

New Member

Joined: 11/13/2009

View Profile


Offline
Posted: 07/04/12 01:50am Link  |  Print  |  Notify Moderator

2004.5 Dodge Ram 3500(4:10 gears) - 19-20 mpg empty running 1900 rpm at 59-60mph - 10.5-12.5 mpg towing 15,000 lbs of 5th wheel

The Mad Norsky

Yankton, South Dakota

Senior Member

Joined: 04/14/2003

View Profile



Posted: 07/04/12 02:25am Link  |  Print  |  Notify Moderator

Actually, most seem pretty accurate here.

I traded my Dodge off last year. Great vehicle, but I just grew tired of rowing a 6 speed manual.

2006 Dodge Ram 3500 Quad Cab dually long box 4 X 4, 325 Cummins 3:73 axle ratio.

@ 60 MPH, 20 MPG was common. @ 70 MPH, 17 or so was the normal.

Think the 6 speed manual really helped the fuel mileage on this one.

As above, just got tired of shifting. Still cherry shape when I traded, folks who bought it drove all the way out here to South Dakota from Ohio to get it.


The Mad Norsky, Doll, Logan, Korey & Rocky
2014 Ram 3500 w/ Cummins/Aisin
2008 SnowRiver 10-8 D/S Torklift, FastGuns, StableLoads
RV'ing since 1991

I took the road less traveled .....Now I'm Lost!

NewsW

US

Senior Member

Joined: 02/06/2012

View Profile



Posted: 07/04/12 05:53am Link  |  Print  |  Notify Moderator

The Mad Norsky wrote:


I traded my Dodge off last year. Great vehicle, but I just grew tired of rowing a 6 speed manual.



You went from shifty to being shiftless?



crickeydog

Marietta, Ga.

Senior Member

Joined: 01/29/2004

View Profile






Posted: 07/04/12 05:59am Link  |  Print  |  Notify Moderator

45Ricochet wrote:

So what is your highway mileage? For me going my local speed limits of 60-65 MPH I get about 20 highway with 3.73's. Did I really get one of those "special" 6.0 PSD engines or what


Solo: Bad
Towing: Worse
Do I really care? Nope!

Happy camping!!! Seey'all down the road!!!


USAF RETIRED 1992 "EITHER LEAD, FOLLOW, OR GET OUTTA THE WAY":
DEPT OF DEFENSE RETIRED 2014
D/W DEPT OF JUSTICE RETIRED 2010

PULL DOG:
2006 GMC 3500 CC DRW D/A LBZ 4X4 SLT, AKA:"THE SILVER FOX" or "THE ROAD LOCOMOTIVE"

2004 HOLIDAY RAMBLER PRES, 30 SCD 5'ER

Bill1374

northern New York

Senior Member

Joined: 10/06/2000

View Profile



Good Sam RV Club Member

Offline
Posted: 07/04/12 06:10am Link  |  Print  |  Notify Moderator

My 06 2wd dually with 4.10s gives me 19 highway, 15 overall, and about 11 towing. Overhead reading is almost exactly 2 mpg optimistic.

Bill


2014 Crossroads Cruiser
2006 Dodge quadcab,dually 2 wheel drive
2014 HD softtail deluxe red sunglow/blackened cayene

4x4ord

Canada

Senior Member

Joined: 12/23/2010

View Profile


Offline
Posted: 07/04/12 06:42am Link  |  Print  |  Notify Moderator

Our 1999 3/4 ton would get as good as 23 on the highway. It was a whole lot less truck than the new ones and you could hardly breath the fumes if you left it running in the garage for more than about 30 seconds.


2011 F350 SRW short box 4x4 CC 6.7 PS King Ranch
B&W TurnoverBall and Companion
2003 Citation Supreme 34 RLTS


thomasmnile

Deltona, Fl.

Senior Member

Joined: 05/14/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 07/04/12 07:46am Link  |  Print  |  Notify Moderator

Bill1374 wrote:

My 06 2wd dually with 4.10s gives me 19 highway, 15 overall, and about 11 towing. Overhead reading is almost exactly 2 mpg optimistic.

Bill


X2. About the typical numbers I see with my '05 3500 SRW with automatic and 4.10 rear end. For extremes: As bad as 9.5 towing the trailer and as good as 21 mpg @ 65 mph on the interstate empty.........and the DIC in mine is also full of it by about 2mpg to the high side on a consistent basis.

Jarlaxle

New England

Senior Member

Joined: 11/18/2006

View Profile


Offline
Posted: 07/04/12 07:57am Link  |  Print  |  Notify Moderator

45Ricochet wrote:

So what is your highway mileage? For me going my local speed limits of 60-65 MPH I get about 20 highway with 3.73's. Did I really get one of those "special" 6.0 PSD engines or what


12V Cummins, 20-22MPG, 3.54 gears, 265/75R16 tires, pushing a flying-brick SuperCab/longbed 4x4 with a snowplow hoist on the front.

I really need to turn up this engine.


John and Elizabeth (Liz), with 3 nutty cats
My beloved St. Bernard, Marm, lost him 1/2/12
Current rig:
1992 International Genesis school bus conversion

Slowmover

Corpus Christi, Texas

Senior Member

Joined: 11/14/2003

View Profile


Offline
Posted: 07/04/12 11:22am Link  |  Print  |  Notify Moderator

Over a one-year period of a 700-mile roundtrip commute between two Texas cities (and traversing Houston on each leg) I had an average that, at 58-mph/1,725-rpm that never fell below 24-mpg. Around 10,000-miles. Highs of 27-mpg on a dead stock truck. Loaded, empty, day, night, traffic, fine weather or bad. And combinations of all of those. I found it consistent with other Southern owners of 2WD '03-'04 CTD's, private and commercial (truck spec, climate, terrain, and use; the main factors for comparison as outlined by Cummins and Kenworth). It is easy to trip plan, now, with that number as a "high" for solo highway travel.

I find that mpg loses a fair amount of meaning compared to using cpm (cents-per-mile) calculations to understand operating costs as it is then fully compatible with purchase price, depreciation, finance charge, tax, registration, insurance, etc, calculations for a family budget. Same for all the line items of vacation expense.

For example, in looking at nationwide ads for travel trailers I can use 20-cpm for fuel costs (solo and towing median) with $4/gl diesel for roundtrip cost estimates to go and buy a good candidate. Or, simply, that solo highway is 15-cpm and towing 25-cpm. It's fun to be able to claim that the average the past 37k-miles is 22-mpg, but a bit more sobering to see the total gallons used and at what cost.

While a CTD is great (the best of the TD trucks the past twenty years), longevity and reliability mean just a bit more than lowest fuel burn. That they coincide (in some model years) is icing on the cake.


1990 35' SILVER STREAK Sterling, 9k GVWR
2004 DODGE 305/555 ISB, QC SRW LB NV-5600, 9k GVWR
Hensley Arrow; 15-cpm solo, 25-cpm towing

restlesswind

Fulltime

Senior Member

Joined: 10/13/2007

View Profile



Good Sam RV Club Member

Offline
Posted: 07/04/12 01:35pm Link  |  Print  |  Notify Moderator

Dr Gonzo wrote:

2004.5 Dodge Ram 3500(4:10 gears) - 19-20 mpg empty running 1900 rpm at 59-60mph - 10.5-12.5 mpg towing 15,000 lbs of 5th wheel

About the same here.Same truck,same trailer weight,I have 48RE auto.
I wonder if some of the MPG quoted are hand computed of off the overhead readout.The read out on my truck is way off.


'04 33.5 CKQG Hitchhiker Discover America
04.5 Dodge 3500 CTD SRW
Pac Brake,Max Brake
Fulltimers since '06

This Topic Is Closed  |  Print Topic  |  Post New Topic  | 
Page of 4  
Prev  |  Next

Open Roads Forum  >  Tow Vehicles

 > Hey 5.9 Cummins owners, what is your highway MPG?
Search:   Advanced Search

Search only in Tow Vehicles


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:

© 2014 RV.Net | Terms & Conditions | PRIVACY POLICY | YOUR PRIVACY RIGHTS