6.2 hwy MPG
06-07-2012, 11:16 PM
#3
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Definately better on 91 or 93 octane. When I had the stock tune, I was getting around 18 on a 500 mile trip running between 70 and 75. With 93 tune, getting a little over 20 same speed, same 500 mile trip.
06-08-2012, 11:39 AM
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I have experience with 87 and E85 in a 2011 CC 4x4 6.2l, all numbers are off of the trucks MPG display, I reset it for each tank to get independent results and fueled up right before getting on interstate (my old man was incredibly critical of the 6.2L I bought and thought it would do no better than 16hwy mpg so i needed very accurate numbers to shut him up). Only Mod is an AFE stage 2 CAI (never ran the highway with complete stock intake).
e85 - 13.3mpg @ 75mph for 2 hour trip. - Only did trip once, milage was terrible so switched back to regular gas.
87 Octane - 18.8-18.9 mpg @ 75mph for same 2 hour trip. - These numbers are consistent through a few trips on the same stretch of highway during april may (typically best milage times here in MN (lower humidity and temps), lower speed will bring it up to 19-19.2
I am waiting on ARH LTs and full cat back and BB tune. I will repost with new numbers after these mods. Hope this helps ya a bit.
e85 - 13.3mpg @ 75mph for 2 hour trip. - Only did trip once, milage was terrible so switched back to regular gas.
87 Octane - 18.8-18.9 mpg @ 75mph for same 2 hour trip. - These numbers are consistent through a few trips on the same stretch of highway during april may (typically best milage times here in MN (lower humidity and temps), lower speed will bring it up to 19-19.2
I am waiting on ARH LTs and full cat back and BB tune. I will repost with new numbers after these mods. Hope this helps ya a bit.
06-08-2012, 08:56 PM
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The best mileage I got with Mods below was 17.9 on a 93 Octane tune @ 72mph (Keep in mind this was conservative on the timing).
Stock was about the same on 93 octane, I never ran 87 in my truck except the tank of full the dealership gave me.
Stock was about the same on 93 octane, I never ran 87 in my truck except the tank of full the dealership gave me.
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06-08-2012, 10:20 PM
#8
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I would get the same results after filling my truck up and a 30 mile trip home from Sams, but i can assure anybody that your mpg hand calculated won't be higher than 19. If it is that is one badass tune.
