RetiredRealtorRick
St. Augustine Beach, FL
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Joined: 04/17/2020
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Grit dog wrote:Fisherman wrote:That's almost not believable from the Cummins. I had an '04 towing a 5k trailer and never got less that 18mpg. Something wrong with that engine.
Almost as unbelievable as getting 18mpg towing a 5klb trailer….
Somebody needs either:
1. New batteries in their calculator
2. A crash course in math skills, or
3. A reminder that honesty is always the best policy
![[emoticon]](https://forums.goodsamclub.com/sharedcontent/cfb/images/cool.gif "cool")
. . . never confuse education with intelligence, nor motion with progress
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nickthehunter
Midwest
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Joined: 07/18/2005
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TurnThePage wrote:Whatchaupto wrote:Cummins12V98. Please explain. 'Tow behind trailers eat more fuel than 5er's.' Thanks. I think it's all anecdotal, but there have been quite a few posts over the years that indicate just that. Speculation has been that the fiver is very close to the truck, reducing drag, despite being taller. Key word here being “anecdotal”
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Cummins12V98
on the road
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Grit dog wrote:Fisherman wrote:That's almost not believable from the Cummins. I had an '04 towing a 5k trailer and never got less that 18mpg. Something wrong with that engine.
Almost as unbelievable as getting 18mpg towing a 5klb trailer….
I agree! Lot's of inflated towing claims. A box behind you at 70 will reduce your mileage for sure.
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"
"HeavyWeight" B&W RVK3600
2016 MobileSuites 39TKSB3 highly "Elited" In the stable
2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD
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Cummins12V98
on the road
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Whatchaupto wrote:Cummins12V98. Please explain. 'Tow behind trailers eat more fuel than 5er's.' Thanks.
Look at the big space between the truck and tow behind. Look at how much that space is closed with a 5er.
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Cummins12V98
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dodge guy wrote:Well the guy I used to work with claimed 25mpg towing his enclosed car hauler after he deleted and tuned it…….so there’s that!
Love these "CLAIMS". Part of the problem is the tuner messes with the MPG. No one fills to the top every tank to know what reality is.
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Cummins12V98
on the road
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TurnThePage wrote:Whatchaupto wrote:Cummins12V98. Please explain. 'Tow behind trailers eat more fuel than 5er's.' Thanks. I think it's all anecdotal, but there have been quite a few posts over the years that indicate just that. Speculation has been that the fiver is very close to the truck, reducing drag, despite being taller.
YES!
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RoyJ
Vancouver, BC
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Joined: 10/19/2006
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nickthehunter wrote:TurnThePage wrote:Whatchaupto wrote:Cummins12V98. Please explain. 'Tow behind trailers eat more fuel than 5er's.' Thanks. I think it's all anecdotal, but there have been quite a few posts over the years that indicate just that. Speculation has been that the fiver is very close to the truck, reducing drag, despite being taller. Key word here being “anecdotal”
There're many studies showing the closer to the cab a 5th wheel sits (commercial semis), the less drag.
One extreme is euro semis, where the trailer is almost touching the cab fairing. Mercedes got 18 l/100km (13 mpg) at 88k lbs GVW.
The other extreme is stretched show trucks (300+ WB Petes), 5 mpg on a good day.
Best mileage would be a short box pickup with a sliding 5th wheel. Have the 5'er up tight against the cab on the hwy.
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IdaD
Idaho
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Joined: 08/06/2014
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9.7 does seem a little low to me for that setup even going 70. Not crazy low but I'd have guessed more like 11 at those speeds. It could have been a windy day, though.
The interesting thing I've learned watching some of these videos recently is how efficient these EVs are in terms of energy use. Assuming this video is accurate, the Cummins carries 5 times the energy but can only tow roughly twice as far. I suppose even less impressive is that the Hummer needs a 3000 lb battery to carry a fifth the energy vs 31 gallons of diesel.
2015 Cummins Ram 4wd CC/SB
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Me Again
AZ - Summer in NW WA
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FishOnOne wrote:Summary towing a measly 6,000 lb camper:
Hummer: ~128 mile towing range (Epic Fail), Price $114k
Ram/Cummins: 9.7 mpg (Fail), Price $68k
Summary: No earth shattering news on the EV, but what was surprising was the underperforming cummins with a disappointing 9.7mpg towing this small camper that has a aero front end.
Link
That is NOT a aero front end! I has hard right angle corners, and the side wall seams appears a raise area along the front wall. All mileage killers like many cheaper RV trailers.
2021 F150 2.7 Ecoboost - Summer Home 2017 Bighorn 3575el. Can Am Spyder RT-L Chrome, Kawasaki KRX1000. Retired and enjoying it! RIP DW 07-05-2021
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the1adman
Tucson, Az
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9.7 is pretty low, but not knowing the conditions it hard to assume. I have a 21 3500 HO and our toy hauler is 15.5K loaded and 13'6'' tall. We live and travel out west in the 6-8% grades and I average 10 mpg. I end up at 8.5 on some legs and 11 on others.
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