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 > Post your MPG in Diesels.

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Joined: 08/05/2012

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Good Sam RV Club Member

Posted: 08/05/12 11:33am Link  |  Quote  |  Print  |  Notify Moderator

Hi everyone,
Looking at getting a diesel truck. Would appreciate your feedback on what you have, and what you get.
Please give me a Truck year, make, model, transmission, rear end ratio.

Empty MPG, City/Hwy.
Loaded MPG City/Hwy.

Plus were your at, Mountains, flatland, rolling hills.

Thanks Doug[emoticon]

Well thanks for all the info everyone. I see this post is not dead and it keeps on giving.
Update. I ended up getting a 2008 Ford F-350 dually Flatbed. And a New 2013 NorthStar Arrow 8.5 Love them both expecially the extra storage compartments on the outside of the camper.
Now these numbers are winter diesel and that tends to be a little less economy I would assume.
Empty 55mph - 15-19
Empty interstate 75mph - 12
T/C loaded - 9.5 any speed
Heres a photo.


* This post was last edited 04/24/13 08:17pm by countrycampers3 *   View edit history

2008 Ford F-350 Dually Flatbed

2013 NorthStar Arrow 8.5 with side storage compartments.


Tontitown ARKANSAW

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Posted: 08/05/12 11:56am Link  |  Quote  |  Print  |  Notify Moderator

Live in the hills of NW Arkansas at 1200 ft.

2008 Dodge Cummins diesel 6.7L - 350 HP - 6 speed Auto
Empty back and forth to work: 15.6
Empty on the highway - 19 to 22 (according to direction and velocity of wind)
Loaded at 11,000 lbs.: City 15 to 16
Loaded at highway speed 12.5 to 14 (according to direction and velocity of wind)

July 23, 2012 Fayetteville, AR to Broken Bow, OK and back to Fayetteville, AR - 396 miles - I averaged 22 mpg running empty 65 & 75 mph - no wind - and I still have almost 1/2 of the tank of fuel I filled up in Poteau, OK on the way down. Amazed me the fuel mileage because this is the absolute best the truck has ever done. I have averaged 19.8 according to the overhead several times going to Dallas, TX and back.

I have hand calculated many times and the overhead is close, but always under by .2 or .3 mpg.

Truck has 72,700 miles on it and 2/3 of those were loaded.

Pictures are on I-80 Rawlins, WY October, 2011 with a nice tailwind - I never reset the overhead display from the time we left Arkansas to Washington State via Missouri, Iowa, South Dakota, Montana, down to Oregon and back home through Utah, Wyoming, Colorado, Kansas, and Oklahoma. My fuel gauge, overhead MPG, and speedometer are the most accurate I have ever had.


* This post was edited 08/05/12 02:17pm by JumboJet *


Western WA

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Posted: 08/05/12 11:59am Link  |  Quote  |  Print  |  Notify Moderator

My truck is the one in my signature an '06 Ford SC longbed automatic 3.73 with the zoodad mod, walker big truck muffler, intake elbow, and I run PowerService Diesel Kleen in every tank.

You didn't describe the MPH which makes a lot of difference. In any case, I've got close to 20 at slower speeds of 55-60 unloaded and 14.5 loaded at the same speeds with some hills.

My more typical mileage at 65-75 are 18.5-19 and 12-13 with a combination of hills and mountains. I don't really have a clear city mileage since I tend to not drive my truck very far in city.

I can't drive very far without dealing with significant hills and mountains considering I live between two mountain ranges in Western WA.

'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 Dbl Slide, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Air Bags, Hankook DH-01 225/19.5 Fs, Curt front hitch, Energy Suspension bump stops.

Less Stuff


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Posted: 08/05/12 12:21pm Link  |  Quote  |  Print  |  Notify Moderator

Only figure my milage by how much fuel is used during a trip.
Last trip of 6456 miles used 475 gallons of diesel.
That's 13.6 miles per gallon.
Two weeks of that trip the camper was unloaded so the truck was running around empty.
The fuel cost me $1864.66.
So the average gallon cost $3.93.
Trip was May and June this year.

My truck

Former user name: "Lots of Stuff"
2015 RAM 1500 V6 8 speed
Regular cab short bed 2 wheel drive.
Leer 180 Topper



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Good Sam RV Club Member

Posted: 08/05/12 12:59pm Link  |  Quote  |  Print  |  Notify Moderator

With truck in my sig I'm getting 14-15 around town, and 10.5-12 towing 11.5I. These figures are mostly on the flats. Don't do a lot of hwy miles unless I'm towing.

Jayco Designer 30 RKS Medallion pkg, Trail Air pin
'05 F350 6.0 PSD CC 4x4 DRW LB B&W Companion, Edge Insight

“Certainly, travel is more than the seeing of sights; it is a change that goes on, deep and permanent, in the ideas of living." Miriam Beard

Craig A

Tampa Bay Area, FL

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Posted: 08/05/12 03:06pm Link  |  Quote  |  Print  |  Notify Moderator

I have an 02 F250 with 7.3 and 373 rear end. Running empty, at 55mph i get 20 mpg, normal driving running 72 or so I get mid 17s. With fiver in signature at 65 I get between 10 and 11. Truck has 210,000 miles and has had minimum repairs.

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Southern Oregon

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Posted: 08/05/12 03:08pm Link  |  Quote  |  Print  |  Notify Moderator

2005 Dodge dually quad cab 4x4 6 speed manual 373 gears.
loaded 12,400 lbs hwy 14mpg, city 12 mpg
empty 18 mpg hwy, 15 mpg city

2005 Dodge q/c 4x4 dually six speed pac brake
2014 Arctic Fox 990
2014 16' smokercraft



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Posted: 08/05/12 03:24pm Link  |  Quote  |  Print  |  Notify Moderator

with the camper : 13 mpg

Empty around town and backroads : 15

Empty on 2x2 lanes : 18 mpg (speed max 115 km/h = 71 mph)

F250 2008 4x4 crew cab short bed

Lance 815 2007
France, Normandy


York, PA

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Posted: 08/05/12 04:10pm Link  |  Quote  |  Print  |  Notify Moderator

2008 Chevy/Duramax

mostly 2 lane country roads, I average around 17 mpg
Highway (60-65 mph) 19-20

Loaded with camper in sig
On a 4443 mile trip from PA to Yellowstone and back, fuel used, 318 gallons of diesel. Worst mileage, 12.3 mpg (head wind in South Dakota). Best mileage, 16.9, but that was only half a tank with half of that spent driving 35-45 MPH in Yellowstone and the other half the downhill run to the East entrance of the park and into Cody WY. Best all highway tank 15 mpg with a quartering tail wind across Indiana and Ohio. Average MPG, 13.97.

2008 Chevy D/A 2500HD ECSB
2010 Northstar 8.5 Adventurer



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Posted: 08/05/12 05:03pm Link  |  Quote  |  Print  |  Notify Moderator

2001 Ford F-350 7.3 liter diesel
18 MPG around town unloaded
22 highway unloaded
14.9 - 13 MPG loaded with 10' Bigfoot

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