2015 w/6.7, g56 What kind of mpg you guys getting?

[apeck5173]

Just picked up a 2015 crew cab, 6ft bed, 4x4, 20inch factory wheels and tires. 7 hour trip home at 70mph with cruise set averaged about 15.8.

What kind of mpg do you guys get?

Do any of you guys have the truck deleted and tuned? If so what mpg?

 

[BubbaJo]

15.8 isn't bad.. what size tires do you have? aggressive treading? is your truck lifted? How clean is the air filter? Lots of variables that can lead to any numbers..

my '12 gets around 13mpgs, best being 14.1 mpg. But i'm running on aggressive 35" tires, and my driving is mixed country back roads, highway, and some city

 

[mtnrider]

That seems a little low for highway driving at that speed. My 2016 would be around ~18-19 (unloaded) doing that drive. Stock or deleted and tuned are pretty much the same. Not much mpg to be gained by deleting the newer DEF equipped trucks (?2014+). I gain "maybe" 1/2 mpg at the most tuning.

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