MPG on my 2023 Denali

[Jocko PDX]

I have a 2023 Yukon Denali with the 6.2. I'm about 400 miles in and am getting 12MPG.. about 1/2 my miles are at around 50 MPH, the others are surface streets. what are others experiencing?

 

[WalleyeMikeIII]

Lot's of variables here, there is a whole thread dedicated to this topic here:

Real Life MPG 5.3 / 6.2

I'm trying to figure out the difference between the 2 V8s when it comes to gas usage. Can you guys throw your numbers over the fence? What engine and what do you get on highway, city, combined? Try to get a better picture. Thx

www.tahoeyukonforum.com

I can easily get 20+MPG on my 6.2 Denali 4x4 driving on the highway between 55-65
Wind is a factor
More than 65MPG and you will see the economy suffer.

Right now I would say, for how I drive, 15MPG city/20MPG Highway is typical for me.
Be sure you are using minimum 91 Octane fuel that the 6.2 recommends.

 

[tooleyondeck]

I get about the same in my 2003 Denali... take that, AFM! lol

Don't forget traffic lights/stop signs drop your instant MPG to 0, so that can affect your "last XX miles" trip average, even if you're only stopped for 3min of a 30min drive.

 

[B-train]

Your mpg will go up after a couple thousand miles. I believe most automakers run their engines a little more rich during the break-in phase to prevent cylinder over heating, etc while rings seat. Plus they may even have some sort of special tuning as well for the first miles....not positive though, but have seem it in other areas of engine development.

A lot of factors go into the calculation though, so it would be hard to compare with another person unless you drive 2 vehicles back-to-back identically. But, at 50 mph, you should be getting much better than 12 mpg. I think if I drove my 2017 like that I would be almost double what you report.

Give it a few more tanks and report back.

 

[tjs3922]

On my 23 Yukon XL I average around 18. On my 23 Yukon it is about the same. I can easily average low 20's on highway driving.

Edit: my first 500-600 miles were all over the place. I now have about 3000 on my XL and 1200 on my regular Denali.

 

[RST Dana]

Have you tried manual calculations? Not that the onboard computer could be wrong, but the onboard computer could be wrong.

 

[Fless]

I recommend manual calculations over several fill-ups. The tank doesn't always get filled to the same level so having data for multiple fill-ups will be more accurate when the calculation is based on the total miles and total gallons used. Fill it up, mark down the mileage, and start tracking with the next tankful.

 

[Vladimir2306]

Very much depends on the speed of movement and the activity of the gas pedal. I found for this generation T1 that the minimum consumption will be 26-30MPG if you drive at a speed of 80 km/h. If you drive 100-110 km/h, then the consumption will be about 20MPG, if you drive 140-150 km/h, then the consumption will be about 15MPG, if you drive 170-180 km/h, then the consumption will be just 12 MPG. So it's strange to me how you get 12 MPG at 50 mph.

 

[GMCnewbee]

V, you are confusing me with the Metric numbers. I'll have to break out my conversion tables. Funny how much better the new vehicles are. I guess if you never had anything "old" you have nothing to compare. We had a 1983 Land Cruiser with the straight six. The best I EVER got was 15MPG on the highway. Usually was around 12 MPG overall. The 6.2 in our Denali is overall in the 18 MPG range, better on the highway. The 2022 Denali is a world apart from the 83 Cruiser.

 

[Vladimir2306]

V, you are confusing me with the Metric numbers. I'll have to break out my conversion tables. Funny how much better the new vehicles are. I guess if you never had anything "old" you have nothing to compare. We had a 1983 Land Cruiser with the straight six. The best I EVER got was 15MPG on the highway. Usually was around 12 MPG overall. The 6.2 in our Denali is overall in the 18 MPG range, better on the highway. The 2022 Denali is a world apart from the 83 Cruiser.

Sorry))) Okay, I’ll say this in the US measurement system))
If I'm driving 50 mph, I'm getting about 26-30 MPG. If I'm driving 60-70 mph, I'm getting 20 MPG. If I'm driving 90mph I get 15MPG. But if I'm driving 110 miles per hour, the consumption will be 12MPG. Of course, I didn’t have such old cars as you wrote, my first car was a 1984 Toyota Corsa, but the dashboard didn’t work, so the consumption there was 10 liters per day))))) On my previous Tachs 2011 and 2014 consumption was approximately the same as on the current Denali 2022. The only difference is that on previous Tahas, consumption in the city was about 12MPG, and on the new Denali 15MPG. So I see that GM has greatly improved efficiency in the city.

 

[GTPace500]

I installed a corsa performance exhaust on my 23 denali and my MPG tanked to aroudn 10mpg. Can't figure out why though = p

 

[DuraYuk]

I get about the same in my 2003 Denali... take that, AFM! lol

Don't forget traffic lights/stop signs drop your instant MPG to 0, so that can affect your "last XX miles" trip average, even if you're only stopped for 3min of a 30min drive.

Your 2003 denali is smaller. Has about 100 less hp and gets the same gas mileage. While also having less displacement.

Guess afm works

 

[tooleyondeck]

Your 2003 denali is smaller. Has about 100 less hp and gets the same gas mileage. While also having less displacement.

Guess afm works

you completely missed the point lol

 

[DuraYuk]

you completely missed the point lol

Yeah I know it was a joke. He was saying his smaller 20 year old, less displacement and 100hp/tq less suv gets the same mpg as the bigger more powerful, bigger engined new version. He was blaming AFM for that.

I get it.

 

[Jocko PDX]

Lot's of variables here, there is a whole thread dedicated to this topic here:

Real Life MPG 5.3 / 6.2

I'm trying to figure out the difference between the 2 V8s when it comes to gas usage. Can you guys throw your numbers over the fence? What engine and what do you get on highway, city, combined? Try to get a better picture. Thx

www.tahoeyukonforum.com

I can easily get 20+MPG on my 6.2 Denali 4x4 driving on the highway between 55-65
Wind is a factor
More than 65MPG and you will see the economy suffer.

Right now I would say, for how I drive, 15MPG city/20MPG Highway is typical for me.
Be sure you are using minimum 91 Octane fuel that the 6.2 recommends.

yes I have only put 92 in it, but the dealer did fill it up first, and I am not sure what they put in..

 

[Jocko PDX]

Have you tried manual calculations? Not that the onboard computer could be wrong, but the onboard computer could be wrong.

good idea ill try that

 

[tooleyondeck]

Yeah I know it was a joke. He was saying his smaller 20 year old, less displacement and 100hp/tq less suv gets the same mpg as the bigger more powerful, bigger engined new version. He was blaming AFM for that.

I get it.

Correct, it was a joke. His milage is a lot lower than average for an L86/L87 and should surely improve.

The displacement difference between and LQ4 and L86 is a whopping 12ci, btw…

 

[Jocko PDX]

While I am disappointed at the mileage so far, I am hopeful that it will improve. When I made the choice to get the big daddy engine I knew their would be consequences. So far I 100% love this rig. My biggest issue is that it is maybe to nice and fancy for me. I am kind of a simple man and have to adjust to owning such a nice vehicle. I cant believe how smooth the tranny is

 

[Vladimir2306]

While I am disappointed at the mileage so far, I am hopeful that it will improve. When I made the choice to get the big daddy engine I knew their would be consequences. So far I 100% love this rig. My biggest issue is that it is maybe to nice and fancy for me. I am kind of a simple man and have to adjust to owning such a nice vehicle. I cant believe how smooth the tranny is

We live once, don't worry about things like fuel consumption. My jet ski consumes 13-15 gallons of 100 gasoline per hour)))

 

[Jocko PDX]

We live once, don't worry about things like fuel consumption. My jet ski consumes 13-15 gallons of 100 gasoline per hour)))

I hear you V My 2003 suburban gets 12.3, the Denali is currently worse, and my boat gets 2MPG on a good day, which makes Tuna fishing 70 miles out an expensive proposition!