2014+ Gas Mileage (MPG) Topic

[Bikewhisperer]

I just test drove a 2015 diesel for 35 miles, then took my broken in 2014 1/2 ton with 3.08 on the exact route. Got the same mileage according to the DIC.

 

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[Mike1220]

I just test drove a 2015 diesel for 35 miles, then took my broken in 2014 1/2 ton with 3.08 on the exact route. Got the same mileage according to the DIC.

 

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Did you encounter the exact same obstacles? Such as stop signs/lights/etc, same speed and acceleration style?

 

 

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[Bikewhisperer]

Pretty much exactly, it was mostly highway.

 

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[liftedSLTsierra]

So Ive been trying to keep an eye on my MPG since I bought the truck. I started two tanks out with E85 and averaged between 10 and 12mpg. I switched to 87 after that and havent gotten anything better than 16mpg. This is all a mix of city and highway, mostly highway and country roads at 55. I do realize that my oversize tires and my lift will affect my MPG but should it be that much lower than what I am seeing from guys on here with 20 and higher? I just started using Fuelly and will keep posting updates to my tracking.

 

I would imagine that having the lift and large wheels/tires will prevent me from getting anything noticed by the dealer as far as a fault with the AFM or false claims of MPG ratings, so I dont plan on going that route but I do want to see if its normal or not compared to others.

 

Edit: Ive currently got 2112 miles on her and my current lifetime is 11mpg

Edited April 7, 2014 by liftedSLTsierra

[Btreyu09]

Did you figure that average or are you going off the computer?

[mzodarg]

230 miles into my new tune Fuel trims are settling in, all city driving with more than a few hard accelerations.

Edited April 7, 2014 by mzodarg

[liftedSLTsierra]

Did you figure that average or are you going off the computer?

Im just going off my DIC and onstar tracking. But I will be tracking by actual average additionally from here on

[Rock1500]

230 miles into my new tune Fuel trims are settling in, all city driving with more than a few hard accelerations.

 

How much of an improvement have you seen?

[mzodarg]

Im just going off my DIC and onstar tracking. But I will be tracking by actual average additionally from here

I would say I am equal to what I was getting when the truck wouldn't get out of it's own way. I've only put 200+ miles on it but the MPG keeps increasing and I drive the crap out of it. If It does nothing better then what I'm getting now, I'll be happy.

 

Mike

[iCryWheniGoPoop]

I would say I am equal to what I was getting when the truck wouldn't get out of it's own way. I've only put 200+ miles on it but the MPG keeps increasing and I drive the crap out of it. If It does nothing better then what I'm getting now, I'll be happy.

 

Mike

 

These trucks have a very efficient tune in them already, they lean fuel way out at cruise (normal) have lean decal rates, shutting down half our cylinders, retarding cam timing, reducing transmission fluid pressure at low torque output to remove parasitic loss along with several other little tricks that eventually add up in the long run. I can see some room for improvement and many may see as much as .5mpg maybe even 1 mpg depending on driving conditions but once you get these things running like they should, most people actually see less MPG because that skinny pedal is so damn fun to mash now. It literally may take months before we start driving like adults again to see if we actually gained anything in mileage.

 

Steve

[CAtaylor]

So Ive been trying to keep an eye on my MPG since I bought the truck. I started two tanks out with E85 and averaged between 10 and 12mpg. I switched to 87 after that and havent gotten anything better than 16mpg. This is all a mix of city and highway, mostly highway and country roads at 55. I do realize that my oversize tires and my lift will affect my MPG but should it be that much lower than what I am seeing from guys on here with 20 and higher? I just started using Fuelly and will keep posting updates to my tracking.

 

I would imagine that having the lift and large wheels/tires will prevent me from getting anything noticed by the dealer as far as a fault with the AFM or false claims of MPG ratings, so I dont plan on going that route but I do want to see if its normal or not compared to others.

 

Edit: Ive currently got 2112 miles on her and my current lifetime is 11mpg

I am right with you on the mileage. Nothing wrong with the truck it is just the nature of the beast. Lift and Tires then the mileage goes down the drain. Gears helped around town but I am still getting 14-14.5 at 75 mph.

[beetle]

Just completed a 3 day road trip, San Diego to Lake Tahoe, Virginia City, over 2 High Sierra passes, sea level to 8000 + ft, 27 to 95 degree temps and a fierce headwind north on Hwy 395, very little V4 mode majority of the trip, no issues or problems, smooth, quiet and comfy, still an awesome truck.

[Btreyu09]

Yeah I'm hitting about 15.3 manually. On the DIC it's coming up at like 16.6.

[Bikewhisperer]

I've seen huge increases since it's above freezing. Getting 650kms (400 miles) out of a tank instead of 550kms (340 miles).

 

It seems so finicky

 

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[Bikewhisperer]

I should mention I took that diesel out for a drive again today. Drove it home in the country and back again, did a bit of running around in town. It was 15mpg, 1mpg better than mine according to DIC.

 

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