So my question is what MPG can I expect on a 2020 Yukon Denali on the open free ways? Out in the west the limit is 80 and traffic is doing it. I am just breaking it in and have avoided the free way so far and it does get the advertised 21 mpg at the slower speeds. Does the big 6.2 go to about 9 at the true free way speed?
2020 Yukon Denali..Fuel miles per gallon
- Thread starter Gary E
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Whatever the posted/advertised mpg is for the highway will be just that. We all know the manufacturer is never wrong or padding that mpg on our rigs. Just the fact that the in town mpg s the same should put your mind at ease. How many miles on it by now? Why avoid the freeway driving during this time? I can't afford one so maybe the manual says to do that? I would be surprised but the newer, the more I know less about all that.
I have 1800 on it now. The first time I was near the free way I was towing a trailer and the book says do not do that for the first 500 miles and if unavoidable go slower. I live in Montana and the nearest interstate is 115 miles away but I will be heading to Utah shortly and the speed limit on the road is 80. I don't see it getting the same at 80 that it gets at 60MPH.
swathdiver
Full Access Member
I've seen fellas on here getting 23-24 on the highway with their Denalis. Some even up to 28 but don't remember the circumstances.
my 2018 Silverado will get over 20 mpg cruising at 100mph, I think your good to go, when you loose it is accelerating, I do a lot of that lol
hcvone
Full Access Member
My Callaway Tahoe just got 24.7 coming back from my home in upstate NY, that was about 8 miles per gallon better than the ride up, which there was no one on the roads causing speeds to be much higher
I've found it depends on many factors as to when the 4 cylinders shut off- since that's how you get a solid MPG figure. Things from weight in the vehicle to even the wind direction- after all we're driving a big ole brick through the air!
TwoBigBoys n dog
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You may get 22 mpg on the highway, but only in the flats. I had 18.2 mpg* overall on a 2K trip from eastern Washington to western North Dakota on the interstate(s) with less than 200 miles 'in town' driving over the Holidays. I have an '18 Yukon Denali, now with 27K, the 6.2L, was running fully loaded with a big Yakima box on 20" Blizzaks, mostly in 2H with limited use of the 'auto' 4WD. Luck or clean living, the roads were amazingly clear and dry. Safe travels. *Running 91 octane
Seamus
Full Access Member
Your not broken in yet. My best mileage started after 5000 miles. I had a 2017 Denali which had the 8 speed and routinely got 21-23 mpg at 80 mph on the highway. I have gotten higher but it took some effort. If your all stock with tires and suspensions, check your air pressures, premium fuel, and aren't flooring it...you will definitely get over 20 mpg at 80 mph, most get up to 24 mpg if you really easy going up to speed. The best part of owning that truck is fuel mileage on a 6000lb truck!! LOL
sealandsky
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Stock vehicle should get about 20 +/- at 80.
Ruby Roo
TYF Newbie
I just finished 2300 miles from NM to Northern California and back. 22.5 mpg average speed of 74. I was running about 1900 rpm most of the time. 91 octane gas. 2017 Yukon XL with 6.2L 40K miles after trip.
GTNator
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My experience exactly.
I’ll add that I tried a “hypermile” and got 28 MPG at 55 MPH for 20 miles on flat roads. But like I said, my normal experience is the above and it’s amazing for a vehicle this big and heavy.
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On my road trips that I take yearly which include Chicago to northern Michigan (360 miles each way) and out to Copper Mountain in Colorado. I typically get around 17.5-18.5mpg's with my Thule box mounted on the roof, speed is typically between 80-90mph. I just got home from Michigan on Saturday, my average speed was 82mph and my DIC said 18.4mpg which at the pump is about .4-.6mpg high so call it 17.8mpg. I think the mileage on these trucks is pretty damn good considering the size, weight, etc..... On the way up to Michigan I drove through some of the worst blizzard type conditions I've encountered which kept my speeds around 50-55mph, DIC showed 24.7mpgs and that was in 4wd high.
This was my mileage after a road trip of 2900 miles with a 6.2 cruise set at just over the speed limit and included local street driving in Laredo and Houston , I was happy except for the Illinois State police stopping me for doing 73 in a 70 ......:-(
That’s kind of petty for sure. Did you get a ticket or just a warning?
HiHoeSilver
Away!
Those idiots. Did he tip his hat forward before he approached your car? Lol
Just a written/printed warning and they checked my brothers ID as well as a game of 20 questions in his squad car ...... the funny thing is I am not a fast driver I just had my cruise control at 73 to not get in the way of the 18 wheelers after the stop I put the cruise right on 75 and was getting in the way of the big 18 wheelers ......
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