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I had a 2001 Chev Tahoe, i towed a 20' 10,000lb enclosed trailer with load stabilizer hitch.

Usually I only towed the trailer a few miles to our farm, but one weekend I decided to take it to a state atv park.

Bad call on my part, I got right around 4 mpg and filling the tank three times to get there and back.

Ended up getting a 2005 GMC 2500HD duramax and let the Tahoe be a grocery getter.
 

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Been there used to have a V8 grand cherokee as a tow vehicle. Had plenty of power but was thirsty and strong crosswinds were not pleasant. 8.5 x 18 trailer upgraded the tow vehicle to a 2020 Sierra with the 6.2 towing mpg is still not great but average 9-10.
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Discussion Starter #4

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no where near loaded as any of you guys.
2018 f150 twin turbo and a single axle 14ft trailer with an xp4 1000. 10-12mpg, normally i get 20ish
 

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I don't have any pics, which I need to remedy. I pull with a 2007 Dodge Ram 3500 HD 4x4 crew cab long bed dually. 3.73 gears with the 6 speed manual.Truck has a Banks Ram Air and filter, (which did drop EGT's and added what feels like about 25 HP usable) and an MBRP Cat back exhaust. Stock otherwise. 53,000 miles.
My 5th wheel Toyhauler is only 35 ft, Loaded I am about 23k.
I leave home at 2000 ft. pull up to 5k in about 15 miles, drop down to 4k, then up to 7300. (Donner Pass), then down to 5k ft.
I run out about 80 miles on relatively flat ground and when I fuel I hand calculate 9 MPG. Towing no hills at 63 MPH I can touch 10, but above 65 MPH it starts burning lots mo.
The newer trucks make a helluva lot more power but they do use more fuel. I would trade the fuel for the power, thinking of tinkering with my 5.9 a bit.
 

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I’m not as heavy as most of you guys with just the RZR in tow, about 4500-5000lbs trailer/rzr.... but I get about 18-20 (hwy) towing my machine, did a good pull over some mountain passes for 400 miles with about 11,000lbs behind me for something else, got about 16 then. Unloaded I’ll get 22-24 on the highway.

2018 2500HD, 6.6 L5P dirtymax. I’ll never go back to a gas tow pig.

653118
 

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Have you guys found your in dash fuel MPG gizmo to be very, very generous? I wish I was actually getting the MPG that thing claims I am. I call it the lie-o-meter at this point. Thing is 3-5 MPG off, especially when towing. When empty it is closer...but still not accurate.
 

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Have you guys found your in dash fuel MPG gizmo to be very, very generous? I wish I was actually getting the MPG that thing claims I am. I call it the lie-o-meter at this point. Thing is 3-5 MPG off, especially when towing. When empty it is closer...but still not accurate.
Temperature, Pressure, and Vapor Expansion in the tank play a large role in its calculations, and it’s still just an estimated calculation. They might perfect them someday, but they’re only marginally accurate at best in most cars now, mine is usually .5 low to 2 high
 

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my bull-$hit-o-meter is off about the same as RWB mentioned. when new i hand calculated the first few times and every now and then. i do have a tow package option which has a 34g tank. without towing i have about a 650mi range give or take. :)
 

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On my jeep wrangler if I watch the MPG gauge and try to really watch it, coasting down hills, taking off easy, etc. The calculation will be off by a few MPG's per tank. If I don't pay attention to it, and drive normally, it is almost spot on.
 

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2012 Cummins 6 speed manual crew cab 4wd dually with full deletes / EFI Live tuning and South Bend dual disk clutch. With an extra 45 gallons of fuel in the bed and a large RKI chest box that has everything you could possibly need in it the truck is a little over 8700 lbs with me and the wife in it. The truck empty will average 18 mpg on the highway, pulling the rzr on a BigTex 20’ car hauler it gets 16-17 mpg and pulling the 38’ camper ( dry weight 10,900 lbs ) 11-13 mpg depending on the terrain. Combined weight with the truck fully loaded and camper fully loaded on our local CAT scales 22,589 lbs. Combined weight towing the 32’ duel tandem with 14-5x6 round bales is usually is around 32,000 lbs. the truck gets 7 mpg the best I can figure with a lot of stop and go and idle time from loading and unloading.
 

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Ohh crap I forgot the 40 gal tank I have in the bed. LOL. And the B&W hitch. Hell make the weight 21000 with us in there also. Still not bad to get 8-9 towing. I'm happy with it. I have yet to get in the Rockies yet. Just east coast Smokey mtns.
 

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Old 2012 Yukon with a 6.2 and a 12' trailer with my XP 1000 averaged about 10mpg last weekend driving from Wichita KS to Buena Vista CO and back. Chinaman's gulch was worth the gas. 😀
 

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Interesting the difference in mpg's with each vehicle, so here's mine.....

2001 F350 7.3, long bed, 3.73 gears
2-300 mile round trip avg's

Towing the flatbed I get 12-13 mpg
flatbed.JPG


Toy hauler 8-9 mpg

toy hauler.JPG
 
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