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Old 04-13-2022, 03:15 AM   #15
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My 3.6L gasser consistently gets 10.5mpg over mountain, hill and dale in tow/haul @ 65mph. Just finished 6,000 mile coast to coast. Lowest regional fuel economy in High wind New Mexico.
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Old 04-16-2022, 08:03 PM   #16
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2017 ram 3500 ctd
Dual rear wheels. Towing a orv 28dbs. 31ft tt.
Gvwr 11k
Gets about 10mpg towing on the interstate 65mph.
A bit better 11-12 on secondary rds at 50mph
Best i ever got was 14 towing out of the mohave preserve back to yuma.mostly downhill with a tailwind lol...
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Old 04-16-2022, 08:26 PM   #17
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2017 ram 3500 ctd 3:42 gears g56 tranny
Dual rear wheels. Towing a orv 28dbs. 31ft tt.
Gvwr 11k
Gets about 10mpg towing on the interstate 65mph.
A bit better 11-12 on secondary rds at 50mph
Best i ever got was 14 towing out of the mohave preserve back to yuma.mostly downhill with a tailwind lol... 16 to 18 not towing... if i reset the meter and drive with a feather i can get 20 or better for a little while..
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Old 04-16-2022, 08:46 PM   #18
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The rig in the signature is consistent at 9 to 10 mpg towing the 19,000# 5er at 65 mph on the flats, depending on the wind. More hills it will drop a bit. In the Rockies, 7.0 to 8 MPG at whatever speed I can easily maintain.

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Old 04-16-2022, 09:48 PM   #19
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2004 Silverado 3/4ton 6.1 engine 280kiled

Cougar 24dabwe
16k# total

Get 10-11 90 oct @ all times every where. W/W-o towing
Taught my kids you right foot is attached directly to your wallet
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Old 04-16-2022, 10:12 PM   #20
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Typical rule of thumb over the years for us was to take the regular fuel efficiency and divide by two when towing.

Jmho.
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Old 04-17-2022, 09:31 PM   #21
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Truck: 1992 Dodge Cummins 12Valve that's been worked on, 5spd Manual trans with 3.54:1 gears.

Trailer: 2005 Forest River Sierra toy hauler 6,900 dry. Always tow with 100 gallons water, two 30lb propane tanks and generally 4 dirtbikes in the back. No idea actual weight but probably around 8,400 per maths.

Truck unloaded in daily driving use gets 21MPG and towing at 55-62 in California I get 13MPG. When we went to Kentucky and back we got 14.38MPG combined over 4,300 miles though. Less stop and go, less hills and mountains I'm guessing.
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Old 04-19-2022, 07:13 PM   #22
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2012 RAM 2500 6.7 Cummins (optimized) with a SnugTop capper. 15/16 empty on hwy. 10/12 towing ORV 25RDS (9995GVRW). I do have racks and a Fly rod carrier on top of truck and I think that sucks at least 1 gal/mi. Worst milage was coming north from AZ through NV with a nasty headwind, -8 mph. Should of pulled over.
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Old 04-19-2022, 11:02 PM   #23
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2016 Ram 2500, 6.4 Hemi, 373 gears, 8.5 to 9 MPG (overall about 40,000 miles) at about 65 MPH. Trailer weighs right at 9500 lbs due to Momma's good food, Cheezits, and beverages.
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Old 04-20-2022, 08:44 AM   #24
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I have 14 years of towing data with my 2008 Dodge Mega Cab Diesel engine truck. This is with two different trailers both 5ers, one a Cougar and the other is a Cedar Creek. My lowest fuel milage was 8.4MPG when pulling into a 40 MPH head wind with the Cedar Creek. Most of the time I have average between 11 and 12 MPGs with both trailers in tow.
In the mountains the truck will normal get 10 MPGs per my records.
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Old 04-23-2022, 09:37 PM   #25
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Our LDTs have come a long way from the '70s era with carb'd 454/460 one ton drws and 14k-16k GN trailers. Pulling a fully loaded 16k trailers I generally ran in the 4-6 mpgs and maybe 12-13 non towing.

I don't tow full time anymore but my 2500 Dodge/Cummins 305/555 HO NV5600 manual tranny 3.73 gears with the OEM Edge programmer for towing adds 40-50 hp and 80-100 torque will average 11.5-12.5 mpg pulling my 12k gvwr 5th wheel rv trailer.
Pulling a 16k GN triaxle stock trailer with 14880 lbs on the trailers axles on a 386 miles trip averages 9.5-11 mpgs depending on head winds in western OK/KS/TX moving stock to winter wheat....then return in the spring.
All pencil figures.

Later model LDT diesels amaze me at the power and low fuel consumption pulling heavy load over the old iron.
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Old 04-24-2022, 06:02 AM   #26
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Originally Posted by CamperLifer View Post
Only 555 torque ? What a wussy engine.
And whats your point or are you just trolling another argument.
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Old 04-24-2022, 07:57 AM   #27
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2016 F350 CrewCab diesel, 4x4, 8' bed, 3:73 rear end, 6sp. transmission, aux. tank (60 gallons), B&W 25K hitch in bed. Towing a Grand Design Momentum triple axle 20K GVWR trailer that is 13'6" tall. Loaded travel weight of ~29,500 lbs. We took an "out west" trip last Sept. and I reset the 2nd trip to zero before starting the trip, and didn't clear it till we arrived back home. Starting location was Knoxville, TN area and travel route was I-40 west all the way to Williams, AZ, then up to Zion N.P, then over to Bryce Canyon N.P, then up and over to Moab, UT, then down to I-40 and headed back east. Stayed in the Ft. Smith, AR area for three days and then continued back to the Knoxville area. Most of the 5143 miles total was towing the trailer, but probably 500 to maybe 700 miles was the truck without the trailer.....and again, the 2nd tripometer was not reset until we got home. Total mileage...5143 miles. Total fuel consumed...625 gallons.....8.2 mpg average for the entire trip. I ran 68 to 70 mph everywhere I could go at that speed, obviously less in in the lower speed limit areas we passed through. Air conditioner running almost the entire time until we got to Bryce Canyon area. Did I leave anything out?
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Old 04-25-2022, 02:54 AM   #28
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Originally Posted by JIMNLIN View Post
And whats your point or are you just trolling another argument.
Looks like you are trolling for an argument because all I am saying is 555 or 655 is not a large torque number nowadays so I don't understand why you are using that as an example.
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