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6.2L gas mileage

6.2L gas mileage

Postby jfusco20 [OP] » Aug 11 2011, 7:47pm

I am looking at getting a Sierra with a 6.2L engine and I was wondering what kind of gas mileage you guys are getting? Also what kind of upgrades would work best for that engine?
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Re: 6.2L gas mileage

Postby marlinjamesmero » Aug 21 2011, 7:05am

i have the 2011 gmc sierra deanli with the AWD and i usually get around 12.5 in the city 15 hwy. has the cold air intake and only use super. Im a little heavy footed at times thoe. even when im being good its only around 13. If im on the freeway doing 65 i can get around 17.
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Re: 6.2L gas mileage

Postby jfusco20 [OP] » Aug 21 2011, 10:59am

Thats actually pretty good mileage! If I just get a four wheel drive and not an all wheel drive, I could possibly get a little better gas mileage?!
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Re: 6.2L gas mileage

Postby EX-F150 owner » Aug 21 2011, 3:56pm

jfusco20 wrote:Thats actually pretty good mileage! If I just get a four wheel drive and not an all wheel drive, I could possibly get a little better gas mileage?!

Mine is 4wd but has the 3.73 gears and 17" wheels. The Deanli has the 3.42 gears with 20" wheels... but his numbers sound about the same as what I see. I get 13 in town with no hwy to factor just yet. I will be making a 6 hour trip to the beach in a week so I can update with how it does then, but I am thinking I'll see around 17. I do not have a heavy foot.
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Re: 6.2L gas mileage

Postby marlinjamesmero » Aug 21 2011, 8:39pm

If driving kinda hard its around 11.5. i went the beach and back yesterday, with the cruise set at 65 i was getting 18.3 i have the 22" inch wheels. it seems weird you wouldnt get better mileage than what i do
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Re: 6.2L gas mileage

Postby Vortec6200 » Aug 21 2011, 8:55pm

I have a 6.2L with 3.73 rear. I'm getting about 14mpg combined city and highway. When I tow, i get around 12mpg.
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Re: 6.2L gas mileage

Postby marlinjamesmero » Aug 21 2011, 11:24pm

not trying to high jack his thread but since mine has the smaller gears and the bigger wheals is that why i get like 8mpg towing my toy hauler?
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Re: 6.2L gas mileage

Postby 2011chevy6.2 » Aug 22 2011, 1:29am

I have the 6.2 with 3.42 gears, do 50/50 driving, and the computer says I get 15.2 mpg with 5,500 miles on the truck.
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Re: 6.2L gas mileage

Postby starspangled6.0starspangled6.0 is online! » Aug 22 2011, 1:32am

marlinjamesmero wrote:not trying to high jack his thread but since mine has the smaller gears and the bigger wheals is that why i get like 8mpg towing my toy hauler?



Is that 8 MPG off of the DIC, or 8 MPG measured at the gas pump? MPG measured from the DIC can be off a little bit, especially if you don't change the speedo\odometer settings with the bigger wheels.
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Re: 6.2L gas mileage

Postby uh6tdrvr » Aug 22 2011, 3:42am

Guys with 3.42's on another forum are reporting in the 18's on the highway. Really it depends on how you drive.
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