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View Full Version : What does your tow rig get for gas mileage? (Part 2)



Tik-Tok
07-18-2019, 03:56 PM
Previous thread is 4+ years old, and there's a lot more campers on Beyond now, as well as some newer trucks with better engines and transmission so I thought I'd ask. Also it's prime camping season, so more people probably have the info on hand.

Truck: 2011 Avalanche
Engine:5.3
Transmission: 6-Auto
Rear axle ratio: 3.42
Tire size: 265/65R18 (31.6")
weight of truck (including people and stuff in the bed): 6798 lbs (3090kg)
total weight of trailer: 5830 lbs (2650kg)
towing speed: 60-120 km/h
modifications: Intake, Headers, and a tune for the trip back

Mileage: Averaged 20.5L/100 kms for our round trip to Tofino and back. 677.7L used over 3302.5 kms.

I unfortunately didn't get the tune prior to leaving, and had it installed on the way back. It's actually a pretty shocking difference between the numbers though. Going from Calgary TO Abbotsford without the tune, so 3500' downhill, I got 23.9L/100 kms. Coming back Abbotsford to Calgary, so 3500' elevation gain, I got 21.5L/100 km

ExtraSlow
07-18-2019, 05:02 PM
That's an airstream too right? That thing slides through the wind a lot easier than the square box trailers. I'm sure that makes a noticeable difference.

Twin_Cam_Turbo
07-18-2019, 05:17 PM
2006 Chev 2500HD extended cab 6.5 box 4x4 LS
6.6L Duramax LBZ
Allison 1000 6 spd
4.10
LT265/75/16 E Load Range General Grabber A/TX studded 31.3”
6900lbs empty
Trailer weighs 5000lbs empty roughly, highest I’ve had it was about 9000lbs loaded (32’+2.5’ V Nose Car Hauler)
Aftermarket exhaust and Edge tuner set to fuel economy tune

Mileage varies from 18L/100km unloaded with the wind behind me at 120km/h to 24L/100km loaded at 9000lbs heading into a headwind at 110km/h. With a open deck car hauler with car (5000lbs) and 550lbs of people it will average 15L/100km at 110km/h.

370Z
07-18-2019, 05:50 PM
2010 Mercedes GLK350 towing our 3500lb (?) FULL 1972 13 ft Holidaire... about 18/19L/100km.

Only been on one trip though lol straight paved highway from Airdrie to Standard Alberta an hour away, drive about 110ish km average..

sxtasy
07-18-2019, 09:03 PM
2003 GMC Sierra 1500hd, 6.0L, 4spd, 4.10 rear axle. Approximately 7000 lbs trailer. Not sure of my truck weight, but we travel pretty heavy with bikes, firewood, bbq, generators in the box of the truck. I haven't tracked long term fuel consumption, but it's not good, around 35L/100km. I usually climb Anarchist mountain East of Osoyoos when camping, it's a pretty long and steep grade, 2nd gear most of the way.

86845

ExtraSlow
07-18-2019, 09:17 PM
my 2800 km trip out to squamish and back recently I got 26 l/100km total, but that includes a maybe 300km of unhitched driving. Actual average more like 28 or 29 L/100km. Weirdly (or not) about the same as I have gotten with every v8 6-speed truck I've ever owned, and this is my fourth version of that combination. Got only a teeny tiny bit better with my ecoboost back in the day, like 25 maybe.
What's incredible is this current truck, I get 19 L/100km even empty.

ThePenIsMightier
07-18-2019, 11:06 PM
My neighbour recently upgraded to a Ram 2500 for pulling trailer. I was horrified to hear he was burning 20L/100km pulling their humble trailer. Sorry I don't have specs but my friend with his 3500 fully emission control deleted Ram is getting closer to 14L pulling a massive trailer.
Maybe my neighbour drives like a douche?
I thought gassers got BRUTAL mileage when towing and diesels barely cared but after my neighbor's report, I'm confused.

Maxt
07-19-2019, 06:46 AM
My neighbour recently upgraded to a Ram 2500 for pulling trailer. I was horrified to hear he was burning 20L/100km pulling their humble trailer. Sorry I don't have specs but my friend with his 3500 fully emission control deleted Ram is getting closer to 14L pulling a massive trailer.
Maybe my neighbour drives like a douche?
I thought gassers got BRUTAL mileage when towing and diesels barely cared but after my neighbor's report, I'm confused.

I think the worst I've ever seen towing anything is 13.xxl/100 km with my Cummins.

Tik-Tok
07-19-2019, 07:28 AM
What's incredible is this current truck, I get 19 L/100km even empty.

There's got to be something wrong with your truck. That's almost as bad as my '77 F250 with a 460, and no overdrive. Unless you're driving 150km/h everywhere, then that would explain it.

Twin_Cam_Turbo
07-19-2019, 07:39 AM
There's got to be something wrong with your truck. That's almost as bad as my '77 F250 with a 460, and no overdrive. Unless you're driving 150km/h everywhere, then that would explain it.

If he’s mostly city driving unloaded that’s pretty normal.

ExtraSlow
07-19-2019, 07:58 AM
There's got to be something wrong with your truck. That's almost as bad as my '77 F250 with a 460, and no overdrive. Unless you're driving 150km/h everywhere, then that would explain it.

There very well could be. I mean, yeah, that's not pure highway mileage, but I don't think I have a tank of pure highway to test on.

nzwasp
07-19-2019, 08:31 AM
2012 Toyota Highlander with Towing Package. 3.5L V6.
Towing our boler out to Dinosaur Park last weekend I was averaging about 14.5L/100K - but this thing is pretty light probably 1500lbs loaded.
one of my friends has a 2014 Toyota Highlander with towing package and he was towing a 3900lbs (dry) 23 foot trailer with about 1000lbs extra in it and he was doing 24L/100K.
I was driving at 120K most of the way and left before him (we both live near Aspen) and somehow even though he left 30 mins later he still bet me to the campsite.

Masked Bandit
07-19-2019, 08:43 AM
2010 Ram 1500, 5.7L with a 5 speed tranny and tow package (3.9X gears I believe). Trailer loaded is probably 7500LB - 8000LB, routinely get 25 - 30 L / 100 KM. The wind and speed make a huge difference, when we go to Fairmont and I have to drive a lot of 90 KPH the fuel consumption improves dramatically.

never
07-19-2019, 09:45 AM
I think the worst I've ever seen towing anything is 13.xxl/100 km with my Cummins.

My Duramax is around that too when towing...13-15L/100km. Lower end when towing cars, higher end when towing the skid steer or a trailer load of logs. Long term average in the truck, including towing, is 10.6L/100km.

Twin_Cam_Turbo
07-19-2019, 09:50 AM
My Duramax is around that too when towing...13-15L/100km. Lower end when towing cars, higher end when towing the skid steer or a trailer load of logs. Long term average in the truck, including towing, is 10.6L/100km.

Wtf is wrong with my Duramax :O

never
07-19-2019, 10:03 AM
Wtf is wrong with my Duramax :O

I don't know...your numbers look crazy compared to what I see in mine! But my truck is 100% highway and I only tow a flat deck or a dump trailer...thought I don't think an enclosed would impose that big of a hit?

Tik-Tok
07-19-2019, 11:45 AM
I don't know...your numbers look crazy compared to what I see in mine! But my truck is 100% highway and I only tow a flat deck or a dump trailer...thought I don't think an enclosed would impose that big of a hit?

Enclosed would definitely affect it big time. I'm always surprised how boxy they make campers these days, I know Airstream has a lockdown on the round design, but the rest of the manufacturers could at least make them sloped.

Twin_Cam_Turbo
07-19-2019, 11:52 AM
I don't know...your numbers look crazy compared to what I see in mine! But my truck is 100% highway and I only tow a flat deck or a dump trailer...thought I don't think an enclosed would impose that big of a hit?

It’s definitely a lot worse with an enclosed. The frontal area of my trailer is insane. I mildly regret not going with a smaller open deck.

Even unloaded though my truck gets nowhere near 10.6L/100km, my best ever tank was 12.9L/100km Canmore to Kelowna with four guys in the truck and the box full (about 1100lbs of cargo and people). What gears does your truck have, is it a LLY or LBZ? What tire size are you running?

never
07-19-2019, 12:09 PM
It’s definitely a lot worse with an enclosed. The frontal area of my trailer is insane. I mildly regret not going with a smaller open deck.

Even unloaded though my truck gets nowhere near 10.6L/100km, my best ever tank was 12.9L/100km Canmore to Kelowna with four guys in the truck and the box full (about 1100lbs of cargo and people). What gears does your truck have, is it a LLY or LBZ? What tire size are you running?

Mine’s an LBZ, pretty sure it has 3.73 and same size tire as you. Intake, exhaust and a few other mods plus custom EFI Live tunes from Kory Willis at PPEI. I usually run it on the 125 tune. When towing a heavier load, I run the tow tune.

And I used to have a different 2006 LZB with similar specs except a Diablo generic programmer...before tune/mods, I would usually see 13-14L/100km but after tune (usually ran the 150 with that truck), it was always 10-11L/100km...without a trailer.

Your gears will be hurting a bit but not that much.

Twin_Cam_Turbo
07-19-2019, 12:34 PM
Interesting. All my injectors are still in spec and it has new oil, fuel and air filter too.

legendboy
07-21-2019, 09:06 AM
Truck: 2008 2500 Dodge ram quad cab regular box
Engine:6.7l
Transmission: 6-Auto
Rear axle ratio: 3.73
Tire size:33.x
weight of truck (including people and stuff in the bed): 7000 lbs (3175kg) est
total weight of trailer: 6000 lbs (2721kg) est
towing speed: 80-130 km/h
modifications: h&s minimaxx, full delete, 4" turbo back, arp head studs, napc trans, billet converter

last tow to east coulee and back 16.6L/100Km. pretty flat towing and slow on the sunday drive back

ShermanEF9
07-22-2019, 07:55 PM
2003 GMC Sierra 1500hd, 6.0L, 4spd, 4.10 rear axle. Approximately 7000 lbs trailer. Not sure of my truck weight, but we travel pretty heavy with bikes, firewood, bbq, generators in the box of the truck. I haven't tracked long term fuel consumption, but it's not good, around 35L/100km. I usually climb Anarchist mountain East of Osoyoos when camping, it's a pretty long and steep grade, 2nd gear most of the way.

86845

That hill is an absolute beast. Been up it a few times.

mzdspd
07-23-2019, 09:36 AM
Truck: 2015 Sierra 2500HD, crew cab, 6.5 ft box
Engine: 6.0L Gas
Transmission: 6-Auto
Rear axle ratio: 4.10
Tire size:Stock, 265/70/18
weight of truck (including people and stuff in the bed): Not much in the truck, two people and a dog.
total weight of trailer: 1750 lbs dry slide in truck camper, probably 2000-2200 lbs with stuff in it.
towing speed: usually 95-105 on highway
modifications: Stock

Mileage seems to really vary with the wind..

Edmonton to Jasper, I was averaging 20-22 L/100k but on the drive back it was really windy so mileage was around 30 L/100k.
Overall, I seem to be getting around 22-24 L/100k on most trips.

I am planning a longer trip through BC (Nelson area) in the next few weeks so I will probably monitor mileage to see what I get on this trip.

Twin_Cam_Turbo
07-23-2019, 09:50 AM
Truck: 2015 Sierra 2500HD, crew cab, 6.5 ft box
Engine: 6.0L Gas
Transmission: 6-Auto
Rear axle ratio: 4.10
Tire size:Stock, 265/70/18
weight of truck (including people and stuff in the bed): Not much in the truck, two people and a dog.
total weight of trailer: 1750 lbs dry slide in truck camper, probably 2000-2200 lbs with stuff in it.
towing speed: usually 95-105 on highway
modifications: Stock

Mileage seems to really vary with the wind..

Edmonton to Jasper, I was averaging 20-22 L/100k but on the drive back it was really windy so mileage was around 30 L/100k.
Overall, I seem to be getting around 22-24 L/100k on most trips.

I am planning a longer trip through BC (Nelson area) in the next few weeks so I will probably monitor mileage to see what I get on this trip.

This mileage makes me glad I went with diesel lol.

mzdspd
07-23-2019, 10:01 AM
This mileage makes me glad I went with diesel lol.

I have never used my truck camper with a diesel but I have talked with a few guys with Duramax's and they are getting maybe 1-2 L/100k better than my mileage with a truck camper.. There is just so much drag from a truck camper..

However, on any sort of hill, I would definitely rather a diesel truck haha.

ExtraSlow
07-23-2019, 11:16 AM
There's some massive advantages to diesel, but then again, there's a real tangible cost to it as well. For the "weekend warrior" type person I think gas ends up cheaper.

s_havinga
07-23-2019, 12:30 PM
I seem to sit right around 19 L/100km in with my 2008 Seirra 2500HD duramax crew cab pulling a ~8000lb 28' camper. I have EFI live and DPF delete. Was closer to 23 or 24 before that. Same trip in my 2011 1500 5.3L gas was 33 or 34 l/100. Crazy to hear numbers like 14 and less. I am not sure mine would do that empty.

dirtsniffer
07-23-2019, 12:34 PM
86889

Truck: 2015 SIlverado
Engine:5.3 Ecotec3
Transmission: 6-Auto
Rear axle ratio: 3.42
Tire size: 275/55R20
weight of truck (including people and stuff in the bed+ hitched up to trailer): 1580 kg FA (3476 lb) : 1610 kg RA (3542 lb): 3190 kg (7018 lb) total
total weight of trailer: 1800 kg (3930 lb)
towing speed: 95-105 km/h
modifications: none

spike98
07-23-2019, 12:37 PM
Just finished my trip to the states. This is from Cochrane to Ione, Wa taking hwy 22 and 3 there, and 3 and 93 back.

I averaged 22.4L/100km hand calculated.

Tow vehicle is a tuned and deleted 2012 Ram 3500 Dually with a 74gal slip loaded, and a 15,550lb 5th wheel (thats as measured). Truck also has the 4.10 rear end. My speed was the speed limit the whole way including through the kootney pass both ways.

Overall, I'm pretty pleased considering my setup. Unloaded the truck gets 11-12L/100km.

cloud7
07-24-2019, 10:41 AM
Towed a light car down to and back from Edmonton in a light open trailer this weekend. Cab and Bed were fully loaded with wheels/tires and tools, and 2 people in the truck. Tried to keep to the 110 km/h whenever possible with short stretches slightly over 110.

From Calgary To Edmonton: 14.8 L/100 km
From Edmonton to Calgary: 16.5 L/100 km

Truck is a 2015 F-150 with 3.5L Ecoboost.

ShermanEF9
07-28-2019, 09:47 PM
There's some massive advantages to diesel, but then again, there's a real tangible cost to it as well. For the "weekend warrior" type person I think gas ends up cheaper.

Yup. Even then, your fuel economy won't really improve diesel vs gas, just your power availability as well as longevity of the vehicle. if im only towing 6000-8000lbs, its pretty much a wash.

nzwasp
07-28-2019, 10:11 PM
Well with towing my new trailer to edmonton I averaged about 17L/100 until bowden when I filled up and there from then to edmonton it went up to 24L/100. This was in Drive on auto. On the way back I used the shifter and used Gear 4 on uphills and Gear 5 on flats and found the mileage to sit between 18 and 20L. On the way there I noticed that drive would rev up to 4000RPM on most hills not changing into gear until the crest of the hill. Controlling it I didnt have any of this behavior.

370Z
08-05-2019, 04:47 PM
I don't feel so bad after reading this thread again.

2010 GLK350 towing a 3400lb ish 1972 14 ft Holidaire... went to Park Lake campground and back to Airdrie, drove fast about 125 average I'd say and it was super windy most of the way, got 20l/100km of premium fuel. At one point my slapomatic refused to downshift for me to pass someone, I'm kind of wondering if I'm overheating the transmission trying to drive that fast. I think I'll stick to the speed limit on our next trip.

ExtraSlow
08-05-2019, 05:08 PM
Got unusually good mileage on Friday. 23.4 L/100km. That's probably the best I've ever had. Drive home today was back to my more typical 27-ish.

370Z
08-05-2019, 06:48 PM
Got unusually good mileage on Friday. 23.4 L/100km. That's probably the best I've ever had. Drive home today was back to my more typical 27-ish.

Man that is nuts... how much would pay on average on a camping trip for gas? I clearly didn't account for this additional cost before we bought our camper but I must say it is nice having it to sleep and eat in especially when the weather is bad.

ExtraSlow
08-05-2019, 07:11 PM
Man that is nuts... how much would pay on average on a camping trip for gas? I clearly didn't account for this additional cost before we bought our camper but I must say it is nice having it to sleep and eat in especially when the weather is bad.

The costs are high for sure.

Tik-Tok
08-05-2019, 07:22 PM
I spent almost $1g on gas for our Van. Island trip. The entire 3 week vacation was $4500. That's including around $1g in reusable camping related items though.

killramos
08-05-2019, 07:31 PM
Still cheaper than Hawaii

speedog
08-05-2019, 07:32 PM
So if we're talking about an extra $10-15 over 100km, is that really that much in the whole scheme of things considering that you enjoy camping/glamping in your own space. Even a 3,000km trip is only an extra $3-400, mice nuts no?

Darkane
08-05-2019, 10:55 PM
2018 f150 crew, short box 3.73, 10sp 3.5 TT.

26’ jayflight jayco 4500lbs dry, about 6000lbs total tow.

North-south on highway 41 with NW prevailing wind, vehicle speed 102-107kph.

28.2L/100, 10.1mpg. Turbos were spoiling like crazy the whole time.

ExtraSlow
08-18-2019, 03:22 PM
There's got to be something wrong with your truck. Unless you're driving 150km/h everywhere, then that would explain it.

If he’s mostly city driving unloaded that’s pretty normal.

There very well could be. I mean, yeah, that's not pure highway mileage, but I don't think I have a tank of pure highway to test on.
So, I finally got a long highway trip to test out non-towing highway mileage. Calgary to Edmonton, cruise set on 128 km/h, got 16.2 L/100km. The drive home I went slower, around 118 km/h and got 15.1L/100km. I'm certain if I stayed at legal speeds I'd be close to 14.
The 4.10 gearing for sure hurts mileage. But I rarely go anywhere without a trailer attached.

Twin_Cam_Turbo
08-18-2019, 03:25 PM
Mine’s an LBZ, pretty sure it has 3.73 and same size tire as you. Intake, exhaust and a few other mods plus custom EFI Live tunes from Kory Willis at PPEI. I usually run it on the 125 tune. When towing a heavier load, I run the tow tune.

And I used to have a different 2006 LZB with similar specs except a Diablo generic programmer...before tune/mods, I would usually see 13-14L/100km but after tune (usually ran the 150 with that truck), it was always 10-11L/100km...without a trailer.

Your gears will be hurting a bit but not that much.

Turns out my truck has 3.73s after investigation of RPO codes more thoroughly. Now I’m even more worried. I went back to stock tune and my last tank mixed city and highway 70/30 was 14.0L/100km hand calculated.

never
08-18-2019, 07:05 PM
If it helps, the more aggressive the tune, the better the mileage I got/get.

mzdspd
08-19-2019, 09:15 AM
Truck: 2015 Sierra 2500HD, crew cab, 6.5 ft box
Engine: 6.0L Gas
Transmission: 6-Auto
Rear axle ratio: 4.10
Tire size:Stock, 265/70/18
weight of truck (including people and stuff in the bed): Not much in the truck, two people and a dog.
total weight of trailer: 1750 lbs dry slide in truck camper, probably 2000-2200 lbs with stuff in it.
towing speed: usually 95-105 on highway
modifications: Stock

Mileage seems to really vary with the wind..

Edmonton to Jasper, I was averaging 20-22 L/100k but on the drive back it was really windy so mileage was around 30 L/100k.
Overall, I seem to be getting around 22-24 L/100k on most trips.

I am planning a longer trip through BC (Nelson area) in the next few weeks so I will probably monitor mileage to see what I get on this trip.

Just got back from BC, did about 2200 km through Crowsnest, Creston, Nelson and back through Revelstoke and to Edmonton. I averaged 20 L/100k, I was normally driving 95-100. Not too bad.

Twin_Cam_Turbo
08-19-2019, 09:25 AM
If it helps, the more aggressive the tune, the better the mileage I got/get.

Interesting, I only tried the lowest state of tune on mine. Maybe I will turn it up to the towing tune or the lowest performance tune and try it.

spike98
08-19-2019, 11:14 AM
If it helps, the more aggressive the tune, the better the mileage I got/get.

This statement has a very big caveat. I know if i ran my performance tune while pulling my 5th, my transmission would likely explode. Its called a tow tune for a reason and i would caution running high HP tunes when towing heavy.

never
08-19-2019, 11:17 AM
This statement has a very big caveat. I know if i ran my performance tune while pulling my 5th, my transmission would likely explode. Its called a tow tune for a reason and i would caution running high HP tunes when towing heavy.
Twin_Cam_Turbo was talking about his non-towing mileage.

Twin_Cam_Turbo
08-19-2019, 11:27 AM
This statement has a very big caveat. I know if i ran my performance tune while pulling my 5th, my transmission would likely explode. Its called a tow tune for a reason and i would caution running high HP tunes when towing heavy.

I’ve only ever run stock or fuel economy tune when towing my trailer, haven’t even tried the tow tune. I’ve run the performance tune once for about 10km and feared for my injectors so went back to the fuel economy tune.

I’ve got a run to Ponoka and back towing a shit ton of furniture and a old Toyota truck this week, will log my mileage by hand as usual.

Twin_Cam_Turbo
08-19-2019, 07:18 PM
Wow I tried the performance tune for about 45km today around town and the DIC was definitely reading lower L/100km.

ExtraSlow
08-19-2019, 07:23 PM
Hehehehehe you said dick.

never
08-19-2019, 07:53 PM
Wow I tried the performance tune for about 45km today around town and the DIC was definitely reading lower L/100km.

Stock to 125 or 150 tune, I usually see a 2-3 L/100 km improvement. But it sounds like I drive slower than you do so that likely makes a difference too.

FYI, I have been running the 125 tune on that truck you looked at before I bought it, for the past 170,000 km. All the time except when towing heavier loads. I’d run the race tune all the time except I don’t like the torque management setup in that tune. A good diesel additive with every tank, a lift pump and no issues.

Twin_Cam_Turbo
08-19-2019, 08:59 PM
Stock to 125 or 150 tune, I usually see a 2-3 L/100 km improvement. But it sounds like I drive slower than you do so that likely makes a difference too.

FYI, I have been running the 125 tune on that truck you looked at before I bought it, for the past 170,000 km. All the time except when towing heavier loads. I’d run the race tune all the time except I don’t like the torque management setup in that tune. A good diesel additive with every tank, a lift pump and no issues.

My tuner has stock, fuel economy, towing, performance and extreme. I stuck it on the performance tune which is supposed to be +85HP and +185LBFT. I do add a diesel additive every fill up as well. I generally am driving like a grandma, I usually stick to the speed limit maybe 5 over but I’m doing mostly city driving.

Twin_Cam_Turbo
08-23-2019, 12:21 AM
On my journey today (a long one thanks to a tire blowout) averaged 19.5L/100km according to my DIC. Trailer was around 11000lbs loaded, truck is around 7000lbs so 18000lbs combined. 95-100km/h average on the way up loaded, 118km/h on the way back unloaded (12000lbs total) with a few sprints up to 140-150km/h. Ran it on the towing tune.

FraserB
09-18-2019, 08:18 AM
Ran full tank of pretty much just towing. 4500lb trailer and lots of hills, usually 90-110kph. 20.02L/100km hand calculated

Truck is a 2008 GMC Sierra 1500 with the 5.3, 4" lift and 285/70/17 AT tires

Twin_Cam_Turbo
09-18-2019, 08:57 AM
Ran full tank of pretty much just towing. 4500lb trailer and lots of hills, usually 90-110kph. 20.02L/100km hand calculated

Truck is a 2008 GMC Sierra 1500 with the 5.3, 4" lift and 285/70/17 AT tires

The 4 speed vs later 6 speed in the later GMT900s is definitely worth 1-2L/100km towing I find.

Twin_Cam_Turbo
10-11-2019, 09:34 AM
Symons Valley RV Storage -> Hamptons -> Ardrossan -> Castrol Raceway -> Hamptons -> Symons Valley RV Storage. Approximately 19000lbs GCWR (two cars in the trailer). 21.3L/100km on the way up, 18.6L/100km on the way back. 06 Duramax, hand calculated. Speeds were 100-105km/h on cruise, peak speed was 133km/h.

Tik-Tok
10-12-2019, 10:17 AM
Fuck, that's awesome. I get the same numbers towing 5200'ish lbs (gasser of course)

Twin_Cam_Turbo
07-12-2020, 02:02 PM
Reset my best unloaded economy at 12.4L/100km. 80% highway 20% city keeping it to 5km/h over, touched 150-170 roughly 5-6 times passing. 20 mins idle time included. 11 cents per km cost.

SKR
09-05-2022, 10:54 AM
My truck is a fuckin pig with a trailer hooked to it. I don't know the weight because it was too hot to bother this weekend, but I pulled a 8.5x23' enclosed v-nose trailer to Medicine Hat and back. 100-110 the whole way, and I roughly calculated 11mpg (25L/100km). I normally get double that, or half that in metric, unloaded. Diesel is about 50 cents a liter more expensive than gas right now too.

ThePenIsMightier
09-05-2022, 11:00 AM
You got 25L/100km on diesel??¡?!
That seems terrible. I thought newer ones would get as bad as 14 if they were pulling a rail car. I think my friend's Ram 1-ton is near 12 but maybe I'm retawded

SKR
09-05-2022, 11:43 AM
Well, if stupid yoyo hadn't made everyone disable signatures you'd see in mine that my truck is a 2007. I don't think of it as old, but 15 years old isn't very new either. New diesels have 300lb-ft or more on mine. Still, 11mpg isn't very good.

I'd listen to a Ram owner talk about where Monsters are on sale, and that's about it. I wouldn't believe any claims about mileage.

ExtraSlow
09-05-2022, 12:12 PM
I rarely anyone who says they get good mileage.

Twin_Cam_Turbo
09-05-2022, 12:13 PM
Wind makes a huge difference on mileage when towing. Towing a 34.5 foot enclosed tandem car hauler weighing 11k-13k lbs with my 06 Duramax was at best 18L/100km and at worst 24L/100km.

firebane
09-05-2022, 12:24 PM
You got 25L/100km on diesel??¡?!
That seems terrible. I thought newer ones would get as bad as 14 if they were pulling a rail car. I think my friend's Ram 1-ton is near 12 but maybe I'm retawded

The older Duramax trucks aren't that great on fuel. My 05 with 17" tires will run at 2600-2700rpm on the highway while doing 120 with the allison 5spd.

If you want the trucks to get any decent mileage they need to be cruising in the 90-100km/h range.

The 2500hd crewcabs are heavy trucks too so everything is against them.

ExtraSlow
09-05-2022, 12:50 PM
But they are sweet, so they have that in thier favour.

zechs
09-05-2022, 02:09 PM
The older Duramax trucks aren't that great on fuel. My 05 with 17" tires will run at 2600-2700rpm on the highway while doing 120 with the allison 5spd.

If you want the trucks to get any decent mileage they need to be cruising in the 90-100km/h range.

The 2500hd crewcabs are heavy trucks too so everything is against them.

LLY's are the worst of the whole dmax lineup for mpg. I've owned/towed with everything except a L5P, and the LLY was shockingly bad even tuned.

LB7 is the mpg champ, if I would have known putting 34's on my LMM would have me running in 5th all the time anyways I might have looked harder for a clean one.

GMT800 2500hd duramax crewcabs are 6900lbs, 1000lbs lighter than GMT900 and newer trucks.

I just towed 8k lbs of flat deck out to Sask and back. First time towing a decent load with the new LMM truck and the big stupid azz 34's on it.

Running in 5th at 105km/h loaded with bad wind and rain was 18L/100km. Unloaded at 110 was 14L/100km

Truck gets 11.5 on H2 unloaded no trailer, was doing 10.5 prior to big stupid tires. So unloaded, pretty comparable to my 01 dmax. Our LML denali that is all deleted and tuned gets slightly better than my LMM, but is a better truck in everyway except for the exploding CP4.

Miss the LB7, towing 14k lbs of two car enclosed trailer cross country it did 20-22L/100km or 10.5-11.5usmpg (about 400-450 a tank)

SKR
09-05-2022, 05:41 PM
Wind makes a huge difference on mileage when towing. Towing a 34.5 foot enclosed tandem car hauler weighing 11k-13k lbs with my 06 Duramax was at best 18L/100km and at worst 24L/100km.

I know all about it. You'd think headwinds would make for hard pulling, but it isn't. A crosswind is the worst. It wasn't all that windy though, except for about 45 minutes from Swift Current to Tompkins.

spike98
09-06-2022, 06:35 AM
In the last 7500km my average is 19.6L/100km towing a 15klbs 5th wheel for over half of that. This is with a '20 Cummins, deleted (+35hp tow tune). This past weekend i went through crowsnest and had a headwind both ways and averaged 22.5L/100km. Thats hand calculated as well.

Best i get on the truck, unloaded is 15L/100km however thats on a +150HP tune. I could baby it down to 13L if i was lite on the throttle but nah.

Twin_Cam_Turbo
09-08-2022, 10:26 AM
I ran to Kelowna and back in a stock 2018 F350 Lariat crew cab short box 6.7L yesterday, empty 22 foot enclosed trailer on the way there (4000lbs roughly) and one car inside on the way back (estimated 7000lbs) and the fuel consumption was terrible. Right around 24L/100km the whole trip, $500 or so in fuel costs. Not only that but the truck was running hot leaving Kelowna and it really needed more power in places.

zechs
09-08-2022, 11:16 AM
In the last 7500km my average is 19.6L/100km towing a 15klbs 5th wheel for over half of that. This is with a '20 Cummins, deleted (+35hp tow tune). This past weekend i went through crowsnest and had a headwind both ways and averaged 22.5L/100km. Thats hand calculated as well.

Best i get on the truck, unloaded is 15L/100km however thats on a +150HP tune. I could baby it down to 13L if i was lite on the throttle but nah.

That's really good towing a 5er, I'm impressed.

Twin_Cam, that's awful, by stock is it not even deleted? So add DEF on top of that I guess eh?

Wild that it was running hot with such a light load and needed more power.

Twin_Cam_Turbo
09-08-2022, 12:12 PM
That's really good towing a 5er, I'm impressed.

Twin_Cam, that's awful, by stock is it not even deleted? So add DEF on top of that I guess eh?

Wild that it was running hot with such a light load and needed more power.

Yep stock stock with 63k. Used 1/3 tank of DEF, water hit 110° and oil hit 120° a few times.