Good Sam Club Open Roads Forum: Towing: towing with gm 6.6 gas
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 > towing with gm 6.6 gas

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Dadoffourgirls

China, MI USA

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Joined: 05/29/2003

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Posted: 02/02/22 10:30am Link  |  Quote  |  Print  |  Notify Moderator

Some stats -
I drove 16324 miles, Avg 13.0 mpg.
459.1 total hours, 79.6 idle.
1308 gooseneck towing miles, 8.2 mpg
Brake pad life - 96% F, 97% R
203 travel trailer miles, 8.2 mpg


Dad of Four Girls
Wife
Employee of GM, all opinions are my own!
2017 Express Ext 3500 (Code named "BIGGER ED" by daughters)
2011 Jayco Jayflight G2 32BHDS

cmarkj

Fulton, Il - on the mississippi river

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Posted: 02/08/22 01:07pm Link  |  Quote  |  Print  |  Notify Moderator

We have a 2500HD with the 6.6 gas. We haven't done a whole lot of towing yet but we have done a trip from northern Illinois to central Kentucky last spring and a few trips to different places in Wisconsin. Trailer is roughly 7500# and at 62mph on the highways we are getting 8.5mpg on avg. i"m very happy with that considering that's what I was getting with my Tundra.


Always looking for the perfect site.

IdaD

Idaho

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Posted: 02/08/22 03:59pm Link  |  Quote  |  Print  |  Notify Moderator

Gas HD towing any kind of heavy-ish high profile trailer is going to be single digits unless you only tow downhill with a tailwind.


2015 Cummins Ram 4wd CC/SB


jffnkrn

peoria

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Posted: 02/15/22 06:31am Link  |  Quote  |  Print  |  Notify Moderator

IdaD wrote:

Gas HD towing any kind of heavy-ish high profile trailer is going to be single digits unless you only tow downhill with a tailwind.


IdaD, I don't want to sound sarcastic, but i get single digits towing downhill with a tailwind anyway!!! and most of the time I get headwind even downhill. so UGH on that, Thanks though

MNRon

Tennessee

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Posted: 02/15/22 08:05am Link  |  Quote  |  Print  |  Notify Moderator

Some older data that doesn’t directly apply, but I pulled a 9k TT with a 2002 8.1gasser for several years. It never bypassed a gas station, I got ~7mpg towing. Pulled fine on flats, and OK on small hills; got stuck slowing down on a pass for a trucker and could never climb back above ~15mph while the engine screamed all the way up the mountain out west.

Replaced it with a Duramax in 2013 and you can’t wipe the smile off my face as I pull our 16k 5er now with ease across the Rockies or wherever I want to go. Get 10-11mpg and even pass gas’s stations now. Haven’t seen any comments on the exhaust brake on diesel’s, that’s worth the price of admission by itself in my opinion.


Ron & Pat
2022 F350 Lariat CCSB SRW Diesel
2019 VanLeigh Vilano 320 GK

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