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03-26-2021, 07:37 AM
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#1
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Member
Join Date: Apr 2016
Location: Avonmore
Posts: 58
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Diesel fuel mileage towing vs not towing?
I am considering a diesel truck for my next TV and wondering what diesel trucks everyone has and and how your mileage compares between when you are towing to just regular driving.
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2016 Jay Flight 26BH
2017 GMC Sierra 1500 5.3L V8
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03-26-2021, 07:58 AM
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#2
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Senior Member
Join Date: Apr 2012
Location: Just south of Sarnia
Posts: 1,036
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2016 Ford F250 super crew diesel 3.55 rear end
Depends on your speed and right foot weight. Do you hammer it or feather the throttle?
Best on the freeway... 18.9 mpg
Average with two lane road travel @ 55-58 mph 16.9 mpg
Best hauling our 5th wheel on freeway 60-70 mph 11 mpg
Normal average two lane hauling trailer at 58 mph 10 mpg maybe a tad better
Two lane roads have a lot more stop and starts slow zones thru towns so it is harder on mileage.
Would I buy a diesel again for hauling trailer? Yup! Truck is actually relatively quiet and just makes the trip easier. Less shifting and high revving.
That and the 80 gallon fuel on board.
Can't get that tank capacity on a gasser
YMMV
RoadrunnerII
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RoadrunnerII
Livin the dream... Retired!
TV 2016 F250 Crew Sterling Gray SB 6.7 PS airlift ultimate Air bags
2017 Eagle 321RSTS
Pullrite autoslider
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03-26-2021, 08:07 AM
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#3
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Senior Member
Join Date: Oct 2019
Location: Whitby Ontario
Posts: 623
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Exhaust brake #1 reason
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03-26-2021, 08:09 AM
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#4
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Senior Member
Join Date: Aug 2020
Location: Daytona Beach
Posts: 713
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My 2001 ford 7.3 powerstroke diesel:
Around town-12 to 14
Highway non towing-18 to22
Towing, no matter what weight, I've had from 5k to 11k tt's-10mpg, and mountains pull it down a tad.
Obviously newer diesels will do better.
Final note: don't mean to shout, but, I DIDN'T BUY FOR FUEL ECONOMY, I wanted a beast to pull stuff with.
Oh, 2001 ford Excursion, love it!!
PaulB12
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03-26-2021, 08:12 AM
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#5
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Senior Member
Join Date: Apr 2011
Location: ON
Posts: 831
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If you're looking at a new truck, I doubt you can go wrong with any of the big 3. You'll have to sit in each one and figure out which one you (or the Mrs.) is most comfortable in.
All 3 are extremely capable and arguably have similar fuel mileage. Of course you'll get an entire range of "I get xx MPG" because of where people live (cold vs. warm climate, hills vs. flat land) as well as how people drive. What some considering a light foot, others would not agree.
Drive each one and see which one puts the biggest smile on your face.
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2015 Jayco WhiteHawk 28BHKS Summit Edition
2021 Ford F-150, 4x4, 3.5L Ecoboost, Max Tow
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03-26-2021, 08:24 AM
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#6
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Senior Member
Join Date: Jul 2016
Location: castle rock
Posts: 171
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I have a 17 Ram crew cab, long bed, SRW 1 ton. I see similar but a bit better than RoadRunner. Around town mid 16 to low 17, highway empty mid 17 to low 19. Got 20 a couple times. Loaded with a light trailer(utility type) it is in the 15's, with the fifth in tow 11-12 never seen below 11 never seen above 13 towing the fifth. Amount of weight in the bed does not really seem to affect mileage ie a big load of firewood or the like.
My previous 01 ram 2500 quad cab got better mileage for sure by about 2mpg
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03-26-2021, 08:48 AM
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#7
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Senior Member
Join Date: Apr 2018
Location: Natalbany Creek Campground, Amite City, LA
Posts: 3,244
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You can see my TV & rig in my signature. 9.5 - 10 while towing, uphill, downhill and all around the hill. 15 in city not towing.
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AL & JANET KRUEBBE
2019 PINNACLE 37RLWS
2018 NORTH POINT 315RLTS (TRADED)
2017 RAM 3500 DRW DIESEL/AISIN 4.10 AIR BAGS
B&W COMPANION TURN OVER BALL HITCH
Formerly from Sequim, WA
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03-26-2021, 08:54 AM
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#8
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Senior Member
Join Date: May 2016
Location: Cincinnati
Posts: 722
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In 1999 I asked DW's uncle about fuel mileage as we were considering a diesel. He said "if you are asking me about fuel mileage, you do not need a diesel". Hmmm...
We have a 2008 F450 Super Duty with a 4:30 rear end so our fuel mileage sucks. With that said, we don't have to worry about upgrading if/when DW wants the "new" trailer.
On the highway, no towing, we get any where from 12 to 15 - a lot depends on the terrain.
On the highway with towing any where from 8 to 11 - again a lot depends on the terrain.
Regular commute any where from 11 to 14.
Now with all of this said, DW definitely has a "lead foot". And she loves driving the truck.
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Dennis & Donna Dohme
2016 36FBTS Pinnacle
2008 F450
USMC Veterans (both of us)
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03-26-2021, 09:32 AM
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#9
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Senior Member
Join Date: Oct 2019
Location: Phoenix
Posts: 4,247
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2004 Duramax -8-12 towing. Depended upon flat or hilly ground and wind. 4 Up major mountains. 20-24 without a trailer. Last of the Duramax without smog and DEF.
2014 Duramax 8-12 towing. Same reasons. 4 uphill. 19-20 no load. Smog crap cuts the mileage down.
I had a 52 gal tank to replace the 26 gal in the 04. With no trailer I could leave Phoenix and not have to fuel until the middle of Kansas (slightly over 1K miles) where the family ranch/farm is. I usually fueled in the OK panhandle because it was cheaper there than other locations.
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2018 Greyhawk 29MVP-Sold
2023 Jeep Gladiator Mojave
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03-26-2021, 10:11 AM
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#10
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Member
Join Date: May 2018
Location: Fort Pierce
Posts: 74
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TV also in signature. 10.5-11.5 towing and 18.5-19.5 empty on the hwy. I love the diesel especially when towing in the mountains
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2018 Pinnacle 37RSTS Disc brakes and shocks. Traded
2022 Vanleigh Beacon 39GBB
2017 F-350 Lariat 6.7L CCLB DRW traded
2020 F-450 Lariat 6.7l CCLB DRW
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03-26-2021, 11:09 AM
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#11
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Senior Member
Join Date: Jul 2020
Location: High ridge
Posts: 815
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01 f250 7.3 ps 264bh. Gets the same mileage loaded or unloaded. The difference between 65 mph and 75 mph is 5 mpg.
Gunnison, co, over monarch pass, up to limon was 17.8 mpg. Dropped to 13 at 75 mph on I-70.
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03-26-2021, 12:44 PM
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#12
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Member
Join Date: Sep 2020
Location: Owosso
Posts: 80
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Truck in signature. It has a 3.31 rear end. Around town average 16-16.5, highway 15.8-16.3 (I’m an 80mph lead foot on highway) towing sig rig 10.8-12.2 depending on wind, hills and type of road.
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Joe and Mary
2015 F350 CCLB SRW 6.7PS
2018 Cougar 344MKS
2006 Jayflight 30.5 RLS (sold)
2018 Ram 1500 CCSB 5.7, 3.92 rear (lease up)
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03-26-2021, 12:49 PM
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#13
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Member
Join Date: Apr 2016
Location: Avonmore
Posts: 58
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From what I'm reading your towing is using about 1/3 more diesel than non-towing for the same driving conditions?
The Diesel GMC Sierra 1500 I'm looking at is EPA rated at 30 MPG highway so would you figure I'd get about 20 MPG highway when towing?
Before we get into a debate about how realistic "EPA rated MPG" is, let me point out that I drive the speed limit and am very gentle on acceleration and usually get at least the EPA rated MPG if not better so this is why I use it as my baseline for comparison.
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2016 Jay Flight 26BH
2017 GMC Sierra 1500 5.3L V8
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03-26-2021, 01:29 PM
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#14
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Senior Member
Join Date: May 2013
Location: Gurnee, IL
Posts: 1,307
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Guntr,
Keep in mind that the diesel will cost you about 300 pounds of payload and towing capacity when compared to the 5.3L gas engine on the 1500 (Crew Cab 4x4 Short Bed).
Here are the numbers from 2020 for reference.
That said, I can understand the desire for the diesel and it should handle your current 26BH fine. I've got my eye on one when we replace our tow beast.
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Scott, DW, and Identical Twin DS (12)
2022 Chevrolet Silverado 1500 LTZ Crew Cab 3.0L Duramax 4WD
2019 Jayco Jay Flight SLX 298BH
2013 Jayco Jay 1206 (Sold)
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03-26-2021, 01:46 PM
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#15
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Senior Member
Join Date: Oct 2019
Location: Phoenix
Posts: 4,247
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Those new to towing might want to keep in mind that tires on RVs are rated for 65 mph. I cannot tell you how many times I have seen someone go blowing by at 75-80 only to pass them as they sit along side of the road with a blown tire, and usually some major damage to the rig.
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2018 Greyhawk 29MVP-Sold
2023 Jeep Gladiator Mojave
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03-26-2021, 01:47 PM
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#16
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Senior Member
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 5,063
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Obviously MPG varies with speed. That said, our ‘13 F350 highway driving (65 mph) we see 11.x towing (13k#) and 19.x not towing. Would I buy diesel again? Oh YEAH!
We started towing a 4500# hybrid with a 5.4 gasser Expedition that never got out of the 9’s while towing but could deliver almost 20 not towing. At first I wasn’t too impressed with the diesel’s MPG until it hit me; it was giving me 25% better mileage while towing 3X the weight!
The 6.7 is an OX and it loves to pull. And yes, I am a “Blue Oval” guy so I’m slanted in my views. The Bow Tie and Ram folks will likely love their trucks as much as I love mine.
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Cheers,
T_
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
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03-26-2021, 02:32 PM
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#17
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Site Team
Join Date: May 2017
Location: Connellsville
Posts: 22,833
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All of my diesels dating back to my first 1992 Cummins Ram towed in that 9-11 mpg range and ran empty in the 18-20 range.
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Moderator
2017 Jay Feather 7 22BHM Baja/Andersen WD
2018 F150 4x4 3.5L Ecoboost Max Tow
2015 MB Sprinter 2500 Passenger 2.1L Diesel
2007 Ram 2500 4x4 Cummins 5.9L G56
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03-26-2021, 04:34 PM
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#18
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Senior Member
Join Date: Nov 2013
Location: Duxbury
Posts: 7,113
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Quote:
Originally Posted by AKRUEBBE
You can see my TV & rig in my signature. 9.5 - 10 while towing, uphill, downhill and all around the hill. 15 in city not towing.
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X2
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Rob & Kelly, Bella & Brady (Miniature Schnauzers)
2022 Eagle HT 28.5RSTS
2017 RAM 3500 SRW CTD/AISIN CC LB
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03-26-2021, 06:26 PM
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#19
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Member
Join Date: May 2020
Location: Lake Country
Posts: 52
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2019 RAM 2500HD 6.7 CTD with a 3.73 axle ratio and I range 9-12 mpg towing depending on load/conditions and 16-20 mpg empty combined highway/city. Towing a Talon 335T with a dry weight of 11,700 lbs. My first diesel and I love it. Previous truck was a GMC 2500HD with the 6.0l gas engine. With a slide in camper and towing a boat ranged from 8-10 mpg. Best highway mpg was 14 and it would not tow what we have now. Friend of mine purchased a similar weight toyhauler last fall, towed it once with a gas RAM 2500HD and got 5 mpg. This winter he bought a RAM 2500HD 6.7 CTD.
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2019 RAM 2500HD 6.7 Cummins
2021 Jayco Talon 335T
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03-26-2021, 06:37 PM
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#20
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Member
Join Date: Oct 2018
Location: Show Low
Posts: 36
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You don't buy a diesel for fuel mileage. Lol
I have a 2018 Ford F-350 DRW I get about 16 empty highway and in town. Towing is 10mpg
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