MPG 6.2l

[Smitty]

6.2 running 92 octane average 16.8 with the best being 25.8 MPG after about 900 miles total on the truck.   I'm fine with that!  

[JacobC1983]

6.2 running 91&93.  Average lifetime is 15.8 and this tank is 16.4.  I mostly drive city.  And I have a heavy foot.  Truck has 5900 miles

Edited March 13, 2019 by JacobC1983

[Ezekiel2517]

Ran a tank of 89 in mine.  Better mpg than I got with 93.  Averaged 17 in town.  Still not taken a road trip but I expect over 20 easily.

[Rsktm300xcw]

Been running 89 in mine and havent heard any knock yet, 12000 miles. Plan to run 91 on next road trip to see if milage changes. Been getting over 21 on the highway as it is on 89. That's in VT hills. Pretty good I think.

[FishinJ]

Only run 93 and with my old truck (2015 with 6.2) I would consistently get 20 - 21 with my daily driving.  This was 25 mins of easy driving on the flat roads of FL.  On the interstate cruising around 80 I would get approx 20 and below 75 mph 21 - 73 depending on speed.  Hand cal would be off about .5 mpg.

 

New 2020 with 6.2 seems a little less so far but have not gotten a good test yet.  Towed the boat to the keys and back last week and got around 11 mpg which is similar to my 2015.

[truck_newbie]

Got this [23 mpg] on a recent trip averaging 70-75 mph with quite a bit of slow-downs. Not bad for a factory lifted 6.2 truck. I do have a tonneau cover though and that helps especially over 60mph. 

[truck_newbie]

Double post.

 

 

Edited October 12, 2019 by truck_newbie

[SeTex]

2019 Denali 6.2 4x4

 

[mistaare]

On 2/26/2019 at 3:50 PM, truckguy82 said:

<K2xx 6.2 with BB tune owner

 

Inwas hoping the new truck got better gas mileage, but that’s a big negative. Same average. 8.5ish (dense NJ driving plus lead foot)

You are only getting 8.5 mpg?!?!?

[DaveHC]

Good mileage with a 6.2, my 5.3 only gets 16.5 on a mixed city/hwy and 15 if just around town

[blazerk5drew]

Average is 16.8 over the life of the truck.  Using costco 93 octane.  Easily achieves over 20MPG on the highway.  Factory intake and exhaust. NHT with 3.42 gears

Edited October 24, 2019 by blazerk5drew

[BigKahuna]

I always run Costco 91 octane, and the truck’s computer is always accurate within a couple tenths of a MPG. High Country 4x4 crew cab with regular box.

[ChasSidwa]

I have about 7,300 miles and my average is 20.4. I live in a rural area so no city. And I use 87. Where in the manual does it say use 93?

[RaisedByWolves]

Im still on my dealer tank, but I suspect they cheeped out on the fill as I had some knocking on downshift a couple times.

 

Still to early to tell as far as mpg goes.

[Jeb1300]

avg 18.5 with 91 octane on my 19, pretty disappointed, both of our 17 6.2 8 speeds would do 21-22 same conditions