How about some gas mileage reports?

[Stbentoak]

Premium is closer to a buck more in WI.

Reason #32 to look for Dmax. Diesel usually is within a dime of RUL and you can go at least 40% further on it....

 

[brkoom]

2021 GMC Yukon Denali Diesel with 4WD. I'm currently averaging 25mpg on the first 1350 miles. I recently averaged 32mpg on a relatively flat 100 mile highway trip with the cruise set at 72 mph. Significant mpg improvement over my previous 2001, 2007 and 2015. Also nice to be able to go 650+ miles between fill ups.

 

[vcode]

2020 Yukon, 5.3 4wdr, 14,000 miles. I am averaging 21.5 overall. I use cruise control when ever I can, the vehicle on the current tank is running 22.5. I had a couple of 500 hundred mile trips on one tank of fuel. Love the vehicle, not one service issue since new, excluding o8l changes.

That must be almost 100% Hwy driving?

 

[vcode]

Reason #32 to look for Dmax. Diesel usually is within a dime of RUL and you can go at least 40% further on it....

That really depends on where you live. It was 50 cents a gallon more her in WI for a long time. More like 25 cents now. How much DEF do they use?

 

[Stbentoak]

That really depends on where you live. It was 50 cents a gallon more her in WI for a long time. More like 25 cents now. How much DEF do they use?

If you are not towing, they prob use less than a gallon per thousand miles, which is about the price of a cup of coffee at any convenience store. People always complain about diesels and the price to run and maintain them, which is absolutely negligible over petrol models vs the mileage and seat of the pants torque they deliver. These same people will drop hundreds on eating out, or Starbucks, etc and think nothing of it. Everyone can spend it any way they want, But I'll pay for a little DEF to get 550+ mile range and 25+ MPG in a huge vehicle like this....

 

[ang2bmd]

21 Tahoe Z71.

20-23mpg highway

16 around town, but as low as 13mpg in winter around town.

Seems like the 21 gets worse than the 16 LT got. Still a great truck anway—maybe not broken in yet!

This is me as well

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[EddieC]

'08, mostly rural driving. Barely breaks 13 even with the system cutting out half the cylinders.
But it was a full tax writeoff, and that was the point.

 

[LeonTexas]

Took a round trip from Dallas to Los Angeles. Averaging anywhere from 18-22 mpg. I have the 5.3L V8 (2WD) LT with tow package. I recorded my trip back to Texas. I filled up 5 times at about ~1/4 of a tank left.

 

[jwth]

alot of naysayers and poo-pooers here.
posted befire and laughed at the " experts" call me a liar.
22 mpg combined with 25 mpg highway with a CUSTOM tune on a 4x4 2003 yukon slt , 5.3 v8 cruise control on and no lead foot.
dont tow anything , dont have anything to tow, on 87 octane regular.
say what you want and welcome too it but true it is and happy I am.
I took thw trouble to learn how to tune it, been tuning gas engines for 53 years and nevee regretted it.
Ok Ready For The "NO YOU CANT GUYS"
read here often but post very little, not an expert like most, just a learner and hard worker.

 

[JR09country]

Took a round trip from Dallas to Los Angeles. Averaging anywhere from 18-22 mpg. I have the 5.3L V8 (2WD) LT with tow package. I recorded my trip back to Texas. I filled up 5 times at about ~1/4 of a tank left.


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What kind of speeds did you run? I know some of those limits in west tx and arizona can get up there.

Good feedback and good data, thanks.

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[LeonTexas]

What kind of speeds did you run? I know some of those limits in west tx and arizona can get up there.

Good feedback and good data, thanks.

Sent from my ONEPLUS A6013 using Tapatalk

Honestly, you don't feel the speed, so its easy to over speed at times. 85-90 mph. This thing is an absolute beaut! Going from Indio CA towards Blythe CA(Arizona border) they’re very steep grades. I flying past everyone at 80. Lol plenty of Torque thats for sure. Climb up with absolutely no problem(engine turning at 1500-1800rpm), other vehicles struggled to climb.(even the diesel 2500’s) I couldn’t believe it.. as im used to the 4.8 v8 Silverado 1500.

 

[Matthew Jeschke]

Story of my rickidy 2001 Z71 with 240,000 miles. I built a cluster with temperature gauge from a bunch of broken clusters haha... Little dis I know the chipset I installed was from a 120 MPH face on a 100 MPH face.

I got on the interstate to test the cluster out and run some errons. I ran the truck up to what I thought was 75 MPH and was FLYING by everybody. I thought what is going on. Everybody is driving REALLY slow!

Little did I know I was going 90 MPH not 75.

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[JR09country]

Honestly, you don't feel the speed, so its easy to over speed at times. 85-90 mph. This thing is an absolute beaut! Going from Indio CA towards Blythe CA(Arizona border) they’re very steep grades. I flying past everyone at 80. Lol plenty of Torque thats for sure. Climb up with absolutely no problem(engine turning at 1500-1800rpm), other vehicles struggled to climb.(even the diesel 2500’s) I couldn’t believe it.. as im used to the 4.8 v8 Silverado 1500.

I hear that, I have a 21 z71 tahoe and i turned the speed notification on at 80 since its so easy to go fast in these things.

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[Bigbird]

2021 Yukon Denali XL
700 miles all city driving with some idling due to cold weather when I first got it
13.5 so Far
Going to Florida in May Looking forward to that

 

[TrueAt1stLight]

21 Yukon Denali 4x4 and have been endlessly driving around my town and local. I filled up today to avoid having to go out if there were riots in Minneapolis and did a direct calculation of pumped gallons to trip odometer miles: I came up with 13.5 MPG which really impressed me that the onboard comp calculation was 13.6 MPG. I don’t care at all about city MPg as I have a lead foot and love listening to that glorious 6.2 getting wound up.

so far the only bit of long travels I’ve been taking were on my “winter” rim and tire set up which is AT4 takeoff 20” rims and Goodyear Duratracs. I averaged approx 19.8 MPG at 80 MPH which blew me away! Also was amazed at how quiet and composed the Yukon was riding on those meaty Duratracs.

I’m in field sales and will be back on the road again after a travel grounding due to COVID in about a month. I routinely drive upwards of 1,000 miles a week, so I’ll quickly become one of this forum’s “mileage guys.” I’ll report back with some real hwy miles, on the OEM 22’s and Bridgestones, as well as a few drives trying to hyper-mile as much as I can to see how close I can come to nipping the heels of the Duramax.

 

[Fireman591]

I have mine on www.fuelly.com

 

[VAguy68]

Would you say you had poor mileage for the couple 1k miles? and then it got better?

Yes, I'd say it's improved some from new

 

[Goldenbear03]

I'm at 8,000 miles on my AT4 now and pretty consistently seeing 16.3 mpg driving around town and home on the highways.

 

[jmm121783]

Right now I am testing my mileage on my new '18 PPV.

My tank isn't finished yet but I filled it up to the brim with E85 @ 77-78% E and I am averaging 14.3mpg over 50/50 city/hwy and it looks like I should get around 450-500miles on that tank of E85.

87 octane would net me closer to 17mpg which in my opinion isn't bad on either front. With E85's performance and price lately it has been a no-brainer for me here in Michigan, I almost solely run CORN through all of my vehicles!! As long as E85 is 20% less in price per gallon, it is the way to go!

 

[Docknow]

That must be almost 100% Hwy driving?

No, this short trips around our area to get out of the house and trips to the twin cities and suburbs. Some days it is 50 to 100 miles some days a round trip to Duluth MN, which is 320 round trip. To go shopping it is a 70 mile round trip with 10 to 15 mile in city driving. No Jack rabbit starts or slamming on the brakes. Best mileage at 73 mph. I have records to back it up.