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Old 03-08-2021, 12:38 PM   #1
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Tow vehicle gas mileage

Last week someone posted about 2019 Nissan Titan XD requesting it’s ability. Did trip to Georgia and back to Southport NC. TV towed extremely well, very quiet, good overall feel. Braking was good but disappointed in gas mileage at best 9 MPG as I just traded my Chevy Silverado with the 6.2 lt and got 12.5 to 13 MPG. Also got weighed at pilot scale 14000 GCVW 2017 25 Flying Cloud
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Old 03-08-2021, 12:48 PM   #2
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2019 F150 Limited...bigger engine. 10mpg pulling Int 25 fB. 8mpg pulling 30' FC Bunk.
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Old 03-08-2021, 01:45 PM   #3
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YMMV! We’re you facing a headwind, either direct or oblique? I normally get 12 to 14 mpg towing a 23FB FC with a 5 l V8 F150. With 20 mph headwinds on the latest trip, that dropped to 10 mpg.
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Old 03-08-2021, 01:56 PM   #4
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This becomes important especially in CA where fuel prices are ridiculously high! We were getting 13mpg towing and 15-16mpg not towing here in TX typically with our 6.7L. However, this past 2 week roundtrip to CA and back we averaged 11mpg towing...I have 107K miles now on m F250 6.7L. Tows well, but hate the MPG...the F150 Echoboost with my earlier 25's was 10 towing and 17 around town.
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Old 03-08-2021, 02:09 PM   #5
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MPG Towing and not Towing

Rig...2013 Ford E150 XLT Premium van with factory tow package and 5.4 Gas engine, 8600 GVWR, 3.73 LSD towing a 2019 FC 25 RBT. Total of van and trailer ready to travel is right at 13,000 LBS per Cat Scale ticket.

About 12k miles towing on this combo. Consistently average 12 MPG when towing and 17/18 MPG not towing. I run 65/70 MPH towing and 70/75 not towing. I use the cruise control a lot!!

I have owned this van for almost 5 years and put just under 50K miles on it. Not towing it gets surprisingly good MPG. I towed a 2017 International Serenity 23D 17k miles and got the same 12 MPG as towing the FC 25.

I consider myself lucky to get this decent MPG with this setup. I check MPG both ways, onboard factory dash readout and do the math manually at the pump. Onboard dash readout is very accurate.
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Old 03-08-2021, 02:10 PM   #6
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My GMC Denali with a 5.3L V8 gas engine does pretty well. On flat highways with light wind, I get just over 15 mpg pulling my 23FB. This obviously changes in heavy wind or going uphill in the mountains. The worst that I've seen was driving across South Dakota last year in extreme headwinds and crosswinds. I got about 7 mpg on that day.
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Old 03-08-2021, 05:18 PM   #7
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F250 7.3l gas engine

I posted this in a different thread hoping to see how others with a similar setup were doing. I have had my 2021 7.3L gas F-250 for about 3 months now, towing a 25' flying cloud, and just finished a trip with about 3000 miles of mostly flatland towing (Chicago to South Padre Island and back). I love the truck, the towing stability is fabulous, but I was hoping for slightly better MPG, I really thought the power and torque of the 7.3l would help me in some efficiency. I am getting about 9.5MPG on average while towing, I try to stick to about 65mph. For those of you with the same rig (7.3l gas F250) would you mind posting your towing MPG observations ?? I do have the 4.30 rear end, love the responsiveness, and feel it’s ideal for towing but not so ideal when I see the MPG results. We all try to spend wisely, I’m not complaining about the cost so much as I am about the range I have (per tank). In hindsight I am wondering if I should have gone with the 3.73 so I could have gained the better range (via MPG) that I want. Only about 5k total miles on the truck, my non towing mpg has been about 12
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Old 03-08-2021, 05:49 PM   #8
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Silverado 1500

2020 Silverado 1500 LTZ 6.2L 10-speed - averaging 12 MPG towing our 25' Flying Cloud with just under 13,000 miles on the truck. Mix of eastern US driving conditions with some mountains. We'll see how it does this summer when we head west. The previous 5.3L 8-speed averaged 11 MPG on our Alaska and western US trip in 2019.
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Old 03-08-2021, 06:10 PM   #9
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2020 F250 6.7 Diesel.
10 spd tranny. 3:31
15-16 towing. 20 non towing.
25’ International
The 3:31 I think really helps with non towing mpg. I was a little concerned at first with towing with that but with 1000lbs of torque it really doesn’t matter.
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Old 03-08-2021, 07:37 PM   #10
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New F250 6.7 diesel 3.31 rear, low 20's not towing and just over 15 mpg when towing a 25 FC @ 60-65.
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Old 03-08-2021, 07:45 PM   #11
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F150 2020 Ecoboost. Not towing I average 18 mpg in all kinds of driving. While towing from 10 to 12 mpg is about the best I get. At least according to the on board computer; which who knows if it is accurate. Really depends upon wind, temperature, hills, etc. But then again I don’t tow 10K a year or more, and most of my driving is daily driving where in the long run the mpgs count the most.

I have heard that 6.2L Chevy engine in the 1/2 ton is a nice engine. But I also heard it wants to guzzle premium as well.

Having said that I’m always a bit skeptical about the mpg numbers anyway.
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Old 03-09-2021, 09:30 AM   #12
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18.2 MPG towing our 30' Airstream Sovereign (1964) 532 miles round trip last week.
That included around 65 miles of local driving along Highway 1 in Big Sur during our five day trip. 2004 Dodge 3/4 Ton 2500 Ram Cummins 5.9 diesel. Three people and two dogs in truck too...with all our stuff. Bought 1/2 tank of fuel at midpoint of trip and arrived home with a 1/3 tank left. :-)
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Old 03-09-2021, 09:58 AM   #13
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Mileage

GMC 1500 SLT, 4x4, off road package, 3.0 Duramax diesel. 14.5 - 16.0 mpg based on winds, hills, etc.
Pulling an International 27FBQ @ 60-62 mph on average.
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Old 03-09-2021, 10:08 AM   #14
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2015 Toyota Tundra. Towing a 26U I get 11.9 mpg. Doesn't seem to matter if hilly or not.
I chose reliability over economy. BTW, I only use regular gas. (87)
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Old 03-09-2021, 10:11 AM   #15
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It would be nice to compare your mileage while driving with California bought gas vs other states. We have the reformulated cleaner burning gas which has less energy per tank than the rest of the states. Also winter gas is 2% worse than the summer blend.
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Old 03-09-2021, 11:13 AM   #16
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There is only X amount of energy in a given gallon of gas regardless of octane. Same goes for diesel. Certainly that X number varies depending on how much ethanol or biodiesel is blended with your fuel. And we all know that diesel is a more energy dense fuel, on the order of 30% more BTU’s per gallon.

Some drivetrains are a little more efficient at getting the energy of the fuel to the drive wheels but there is no “magic” device that can deliver more energy than that gallon of fuel contains.

The single biggest determinate of the mileage you will get is the speed you wish to travel. Want to go 70? No problem but you will (at least in a gasser) be getting single digit mpg. Tow at 60, probably 25% gain in MPG.

My point? Take all of the anecdotal reports of mileage you read on the internet, throw out the high 20% and the low 20% and you will find that everyone gets pretty much the same mileage.
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Old 03-09-2021, 11:28 AM   #17
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387mi 30 gal tank @ 58-65mph.
WMW? It's not at the top of the towing priorities.

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Old 03-09-2021, 03:34 PM   #18
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13.2MPG 2005 cummins diesel
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Old 03-09-2021, 04:26 PM   #19
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13.3 mpg

Quote:
Originally Posted by Gizmosp641 View Post
Last week someone posted about 2019 Nissan Titan XD requesting it’s ability. Did trip to Georgia and back to Southport NC. TV towed extremely well, very quiet, good overall feel. Braking was good but disappointed in gas mileage at best 9 MPG as I just traded my Chevy Silverado with the 6.2 lt and got 12.5 to 13 MPG. Also got weighed at pilot scale 14000 GCVW 2017 25 Flying Cloud
I left some detail out of a post I made here.
2005 Dodge Ram 3500 DRW 5.9 L Cummins Diesel 6 cylinder, 6 speed manual.
8000 empty I am getting 13.8..... I have a heavy foot.
With a 25’ 1997 Safari full water no waste, my last two trips to Gettysburg, and Myrtle beach I averaged 13.2 MPG.
Overkill? It is now, bought the truck 8tears ago, I was looking for a 5th wheel, when I happened upon a SWEET deal near original/perfect 97AS., 1 year ago.
My only complaint is that I pay price near what all you gassers would pay for premium gas. Will I get rid of my truck? H. no! Engine brake, extra heavy service brakes, ability to pull a semi? yep! More expensive to maintain, yes, I do as much maintenance as I can.... engine machine work and some suspension work I have a mechanic I can trust.
To everyone, learn as much as you can about the vehicles you own, I will save you thousands each year! Rick
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Old 03-09-2021, 04:28 PM   #20
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Quote:
Originally Posted by n2916s View Post
There is only X amount of energy in a given gallon of gas regardless of octane. Same goes for diesel. Certainly that X number varies depending on how much ethanol or biodiesel is blended with your fuel. And we all know that diesel is a more energy dense fuel, on the order of 30% more BTU’s per gallon.

Some drivetrains are a little more efficient at getting the energy of the fuel to the drive wheels but there is no “magic” device that can deliver more energy than that gallon of fuel contains.

The single biggest determinate of the mileage you will get is the speed you wish to travel. Want to go 70? No problem but you will (at least in a gasser) be getting single digit mpg. Tow at 60, probably 25% gain in MPG.

My point? Take all of the anecdotal reports of mileage you read on the internet, throw out the high 20% and the low 20% and you will find that everyone gets pretty much the same mileage.
I would have put the volumetric energy advantage of diesel over gasoline at 12%

It is certainly possible to get more out of a gallon of fuel, the starting point would be to vary the compression ratio. That covers most of the difference for a diesel engine over a gasoline engine.

Everything else down the powertrain is just about losing less, eg lock up torque converters.

Agree with the comments on travel speed, it is the biggest variable.
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