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Old 07-25-2011, 01:24 PM   #1 (permalink)
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Anyone tow with a Chevy 6.2L Vortec?

Friend of mine has a 2010 Yukon Denali with the 6.2L/6L80 trans, and he's always complaining about the mileage. I got a photo last night showing the dash reading 7.2 avg MPG going from central PA to Ocean City MD and back, cruise set on 72-75mph.
He was only towing a 10' v-nose trailer with 2 quads in it.

Granted, this is the same guy with a 621rwhp Trans Am, a modded Dmax, hell, even his quad has a big bore and nitrous kit on it, but I think 7.2 is really low. I'm getting better mileage than that with my 8.1 towing a much larger and heavier trailer..

The Denali is (for the time being) bone stock. The whole LS-series of engines seems pretty fuel efficient, I am just surprised by this.. 10mpg I'd expect.. but 7?

What are other owners seeing?
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Last edited by Eskimo; 07-25-2011 at 01:25 PM.
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Old 07-25-2011, 02:48 PM   #2 (permalink)
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Interesting information.

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Old 07-25-2011, 07:48 PM   #3 (permalink)
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My dad has an 04 ss silverado with the 6.0L ive towed my 7x14 enclosed trailer with a few dirtbikes in it and all our camping stuff. Gas mileage is right around the same. Aslo it has exhaust and an intake. I love driving the truck but its horrible on gas. I only tow with my diesel now.
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Old 07-25-2011, 07:58 PM   #4 (permalink)
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I had the 6.0 as well and would get 11.9 cruise control on 70 going down I-95. Towing my boat I was lucky to get 9. Hence the reason I went to the Duramax
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Old 07-26-2011, 04:49 AM   #5 (permalink)
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rich - you think the 6 speed combined with the hills, mixed with aggressive driving style ?

Maybe you should offer to test it out with your setup for a day trip to base line it..

my .02 - I find former/current diesel owners have an expectation of what a gasser should or shouldn't do and tend to lean on the pedal harder than needed to maintain a pace of what their diesel truck woulda/coulda/shoulda done. That leaves them with poor mpg and always complaining they miss their diesel truck... With a gasser you really need to know/feel where your sweet spot is for your setup and load and stay there as much as possible. Sometimes that means running a little slower out of OD....
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Old 07-26-2011, 06:33 AM   #6 (permalink)
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I think it's him.. He drives his dmax hammer down, and the T/A, well, if that thing ever saw the light of day, it's wide open too.

That said, I'm thinking he just put the cruise control on and let it eat. honestly, I do the same thing, even though I know it's not best for MPG, but I stick to 70.. I don't think he was honestly doing 72-75.

And yeah, I really should offer to swap vehicles.. those cooled seats would feel SOOO nice in this heat.. it's like a gentle breeze tickling the balls..


Oh, and to the 2 newbies who talked about their 6.0 - that's not what I asked about.
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Old 07-26-2011, 01:11 PM   #7 (permalink)
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One thing I didn't note in my posts was that I did not use the cruise. I hate the cruise in this thing when loaded, even with just a jetski. Before it will lose more than 2 mph it will drop the hammer and also go down 2 gears. It's way to sensative IMO and has to drink fuel doing that. I would think that the truck I was towing had more wind resistance and weighed more than your buddies load. I wasn't in any hurry on my trip and also didn't hammer down to pass many people. If you drive it like you stole it even empty it will drop to 12-14 easy. Been there done that. My last tank was 13.4. I drove it hard for at least 1/2 of the tank. And made 4 in town stop and go trips.

His numbers are hand caculated right? Not that it matters much. Bone stock the computer has mine so close it's crazy.

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Old 07-27-2011, 03:57 PM   #8 (permalink)
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His numbers are hand caculated right? Not that it matters much. Bone stock the computer has mine so close it's crazy.
Nope.. took a picture of the trip computer with his phone that showed that number.
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Old 07-29-2011, 12:40 AM   #9 (permalink)
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Quote:
Originally Posted by Eskimo View Post
Friend of mine has a 2010 Yukon Denali with the 6.2L/6L80 trans, and he's always complaining about the mileage. I got a photo last night showing the dash reading 7.2 avg MPG going from central PA to Ocean City MD and back, cruise set on 72-75mph.
He was only towing a 10' v-nose trailer with 2 quads in it.

Granted, this is the same guy with a 621rwhp Trans Am, a modded Dmax, hell, even his quad has a big bore and nitrous kit on it, but I think 7.2 is really low. I'm getting better mileage than that with my 8.1 towing a much larger and heavier trailer..

The Denali is (for the time being) bone stock. The whole LS-series of engines seems pretty fuel efficient, I am just surprised by this.. 10mpg I'd expect.. but 7?

What are other owners seeing?
Perfectly normal.


It he tows often use the duramax, if not get over it if its not that often.
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Old 07-29-2011, 06:20 AM   #10 (permalink)
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Granted, this is the same guy with a 621rwhp Trans Am, a modded Dmax, hell, even his quad has a big bore and nitrous kit on it, but I think 7.2 is really low. I'm getting better mileage than that with my 8.1 towing a much larger and heavier trailer..

All these toys an he is crying over bad fuel mileage in his 60+k vehicle?
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Old 07-31-2011, 07:59 PM   #11 (permalink)
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Perfectly normal.
It he tows often use the duramax, if not get over it if its not that often.
That's what I said, but I guess he had enough people with him that the dmax wasn't big enough.

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All these toys an he is crying over bad fuel mileage in his 60+k vehicle?
Yes. The difference is, he's not crying, just stating his surprise.
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