2014+ Gas Mileage (MPG) Topic

mzodarg · May 5, 2014

Just did a short 220 mile round trip up to OKC on Saturday (GO THUNDER!!), Left on 1/2 tank and did not reset the DIC. I Completed the trip averaging 18.8 MPG best 50 mile MPG was 23.7, I was running 80 MPH. My truck is tuned and AFM is turned off. I'm pleased!

Mike

TJay74 · May 5, 2014

I just did 230 miles this weekend from Norman to Keystone lake. Did 5 over the speed limit other than on the turnpike I did the posted 75. Got home and filled up (half a tank) and did the average and got 19.9mpg for the trip.

Not bad for a 6.2l truck in my mind.

TxTruckMan · May 5, 2014

Those are great numbers for teh 6.2L. Though around town is where I bet the larger engine takes a MPG hit. I can average 18 with my standard 50/50 mixed driving if I take it easy, but my lifetime average is 17. I'm happy.

TJay74 · May 5, 2014

I am still averaging 17.5-18 in the city with my mixed driving.

Audioi · May 5, 2014

My friend bought a 13 Ram 5.7 auto 4x4 and gets a constant 13~13.5, I feel really good about the GMC.

dodgehemi0 · May 5, 2014

Here is a pic of my onstar to show I am at 18mpg lifetime this is for my 2014 Denali 6.2 4x4 crew.

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Edited May 5, 2014 by dodgehemi0

14'SilveradoLT · May 6, 2014

I've been running 89 octane shell with an ocassional 93 half tank. On a full tank of 89 my mileage was 15.8 on 3/4 of the tank...

Monitoring with tq pro, KR was consistently 2-3* across the board and max at around 4*. So I reset it this morning for 18.8 miles and got 18.5MPG's.

---Filled back up at 1/4 of tank with 93 V-power....Reset trip B and ran 18.6 miles back. 21.7MPG's and -1 to 2* KR across the board and still maxed at 4*.

The truck just holds the gear better with 93 octane, and the knock sensors like the 93 octane. Passed one car and it just feels so much smoother.

---Disclaimer--- No it's not scientific....and some misc info. The 18.5mpg was at 38lbs in the tires and the return trip showed 39-40lbs (tires being warmed up from the trip). Typically 1lb of air in all 4 tires is worth .1-.3 mpg's. Also my understanding and expeirience has been that 1* of timing on a "higher" compression engine is worth around 3-8hp. so theoretically the truck pulling around 2* less of timing throughout most of the trip would mean that 93 helps it gain ~10hp across the board...not enough to quantify but if across most of the map it would reason that this might be just enough to keep it in v4 longer.

Newm · May 6, 2014

Just ran to the lake and back for work yesterday. Filled up right before starting and filled when I returned. A little over 200 miles traveled with 95% cruising at 72 MPH. Hand calculated I got 20.02 MPG and I could not be happier. If a guy could slow down to say 65 or so I don't see any reason it couldn't get 22 MPG on the highway. Absolutely love this truck!!!!

Mike1220 · May 8, 2014

Just ran to the lake and back for work yesterday. Filled up right before starting and filled when I returned. A little over 200 miles traveled with 95% cruising at 72 MPH. Hand calculated I got 20.02 MPG and I could not be happier. If a guy could slow down to say 65 or so I don't see any reason it couldn't get 22 MPG on the highway. Absolutely love this truck!!!!

While traveling at about 60-65 mph I usually average around 24-27 MPG! That's with CCSB 5.3L with 3.42 gears on my sierra. It is also leveled with magnaflow and AFE power with K&N air intake. At 70 I get around 22, and then when I start tailgating 18 wheelers in the next lane (that way I don't get any rocks thrown at me) then I shoot up to around 24MPG and 70 mph. Still really impressed and very happy with the mileage these trucks get

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MD Chevy · May 9, 2014

Just filled up. 20.1 mpg. That's a mixed bag of driving. Highway, city, mountains, rural and fields. I have a double cab v6 4x4. This tank also had a couple 60 ft burn outs. Can't complain at all!

fondupot · May 9, 2014

While traveling at about 60-65 mph I usually average around 24-27 MPG! That's with CCSB 5.3L with 3.42 gears on my sierra. It is also leveled with magnaflow and AFE power with K&N air intake. At 70 I get around 22, and then when I start tailgating 18 wheelers in the next lane (that way I don't get any rocks thrown at me) then I shoot up to around 24MPG and 70 mph. Still really impressed and very happy with the mileage these trucks get

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Yea if you can find a trucker to draft, these things will get 22+ all day long!

dodgehemi0 · May 9, 2014

Update 6.2l 4x4 Denali

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Brock Samson · May 12, 2014

Just did a short 220 mile round trip up to OKC on Saturday (GO THUNDER!!), Left on 1/2 tank and did not reset the DIC. I Completed the trip averaging 18.8 MPG best 50 mile MPG was 23.7, I was running 80 MPH. My truck is tuned and AFM is turned off. I'm pleased!

Mike

How did you get the AFM turned off?

TJay74 · May 12, 2014

He has tuned his truck, tuner turned the AFM off thru the tune.

CAtaylor · May 13, 2014

While traveling at about 60-65 mph I usually average around 24-27 MPG! That's with CCSB 5.3L with 3.42 gears on my sierra. It is also leveled with magnaflow and AFE power with K&N air intake. At 70 I get around 22, and then when I start tailgating 18 wheelers in the next lane (that way I don't get any rocks thrown at me) then I shoot up to around 24MPG and 70 mph. Still really impressed and very happy with the mileage these trucks get

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You running the 63 series K&N? I had one on my 07 1500 and it was great. Thinking about getting one for this one since AFE has no desire to make a MIT for the 2014 right now.