How about some gas mileage reports?

[Artem-G]

Here’s what I get. Not great I know, I complained to the service people at the dealership, they explained the truck isn’t broken in yet and the mileage will get better over time.

 

[Quark]

That is mixed driving since I bought it 1500 miles ago. I was getting 20 mpg on the highway during a recent trip.

I use 91-93 octane fuel.

This is a vehicle that just does not get great gas mileage. I heard that the diesel version mpg’s are better.

Diesels will get better mileage but per mile fuel cost may not be worth the added maintenance expense unless one drives a lot of miles per year or tows often, in my book.

20mpg highway is what I get if using 87 octane and you have a decent horsepower advantage.

 

[Quark]

View attachment 276686

Here’s what I get. Not great I know, I complained to the service people at the dealership, they explained the truck isn’t broken in yet and the mileage will get better over time.

Times 2.35214583 would make that 10.349441664969 mpg? That must in a lot of idling or cold weatheror a lot of full throttle starts? If not I would also be talking to the service department. Break in won't make that much difference.

I have that all screwed up, we need somebody smart. 4.4L/100 km conversion comes to 53.457859839716mpg?

 

[Gibby13]

Diesels will get better mileage but per mile fuel cost may not be worth the added maintenance expense unless one drives a lot of miles per year or tows often, in my book.

20mpg highway is what I get if using 87 octane and you have a decent horsepower advantage.

Which engine and what speed do you get 20mph on the highway with?

 

[Quark]

Which engine and what speed do you get 20mph on the highway with?

That would be my 2012 Tahoe with 5.3L. Under ideal conditions, flat and no or a bit of tail wind, running 89 octane at 70mph it's capable of 22+mpg.

 

[TwoBigBoys n dog]

I know they say if you're buying a big SUV you shouldn't care about the gas mileage but I'm not one of those. I would be quite interested to know what our courageous buyers are seeing especially on the 5.3L. Trips, combined city highway, from the DIC or hand calculated all will be appreciated. How fast you drive, load of vehicle, etc. the more info the better.

2018 Yukon Denali 6L w a Yakima topper on 22" all seasons running 91 octane. spring break trip down I-15 n back ~3400 miles 19.7 mpg

 

[VAguy68]

I do about 106 miles round trip each day. I have 15K on my '21 Z71 5.3 as of this morning. My best 50 mile loop was 24.4 mpg. I don't know how or where I did that but that is what the gauge shows. Now if I soft pedal it on my way home (53 miles) I can get upwards of 22 mpg consistently. My to date overall average is almost 19 mpg.

It's really comparable to my '15 F150 ecoboost I had. The difference is if I really dug in to that turbo, gas mileage would plummet. My lifetime avg in that truck was just under 18 mpg.

The one thing I miss is the the 35 gal tank.

 

[Gibby13]

I do about 106 miles round trip each day. I have 15K on my '21 Z71 5.3 as of this morning. My best 50 mile loop was 24.4 mpg. I don't know how or where I did that but that is what the gauge shows. Now if I soft pedal it on my way home (53 miles) I can get upwards of 22 mpg consistently. My to date overall average is almost 19 mpg.

It's really comparable to my '15 F150 ecoboost I had. The difference is if I really dug in to that turbo, gas mileage would plummet. My lifetime avg in that truck was just under 18 mpg.

The one thing I miss is the the 35 gal tank.

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

 

[vcode]

You should try being in SWFL. Its like the fast and the furious light to light down here. Tons of high powered and high dollar cars down here and all are ready to drag, especially after dark...light to light or on 75. If you don't drive 85 min on 75, you get your doors blown off....

I too don't really care what fuel costs, but it Irks me that fuel companies will jack premium up +.60 cents over RUL. I remember when mid grade was + .10 and the premium was another .10...Ok that's fair enough. Any decent big or performance vehicle REQUIRES it to run the way is should. I hate having to stop for fuel every week or seeing the needle drop noticeably every time you go do anything... Just proves what a gas horse these vehicles really are. If I can't find or get one with a Duramax ( Rare as hens teeth in my area...) I'll prob just Keep my JEEP GC EcoDiesel another year. Over all it runs great and solid 27-30 MPG....

Premium is closer to a buck more in WI.

 

[vcode]

DIC on my 2010 Tahoe LT (5.3L) is at 16.8 right now, mixed driving. But I get 21 mpg on the 140 mile round trip to our cottage at 65-70 mph (hand calculated and per DIC).

 

[JasonHTX]

I'm a lead foot, and I am getting 16.1mpg combined (2876 miles). I have also done more than normal idling, and quite a bit of in-town driving (65%).

I am content.

 

[Greg Carrasco]

2005 gmc yukon denali 6.0 awd. 89 octane, mid grade fuel at 711/alon. . Avg about 14mpg at 70mph. 12mpg at 75mph. Where you put fuel also makes a difference on mine. Mpg drop when use Murphy usa, circle k, Valero or speedway. 91 octane makes no noticeable difference on mine.

 

[Amaster]

You show me yours, I’ll show you mine.

My yukon xl is getting 17 city which isn't bad with the flex fuel shut off thing 19.5

 

[norcalboon]

2012 Denali XL 6.2L 91 Chevron hand calculated
16-17 Hwy 75MPH with 500 lbs of family and stuff
11-13 City Wife DD w/ kids
8-10 Towing 6.5K TT

2005 Yukon Xl 2500 (6.0L) 87 Chevron hand calculated
13-14 Hwy @ 75
11-12 City
8-10 Towing

 

[Matthew Jeschke]

I logged every gallon of gas I put into my Tahoe since I bought it with 225k miles haha

My truck is 2001 Z71 tahoe. 5.3L and the 3.73 gears I believe. It also has the AWD transfercase.

I am up to 240k and blew up 5.3L. Was my fault motor was good as new. Blew it up tinkering.

Best I ever got was 18mpg if memory serves me right. This was on highway for roadtrip.

Typical is 12mpg as my truck lives on forest service roads going naybe 25mph over ruff roads.

I get around 16 mpg in town though. Very careful with gas.

We will see what 6.0L does. I hopped it up a bit with upgraded cam, springs, and lifters. May take a few months to get decently tuned as well.

Sent from my SM-A505U using Tapatalk

 

[gunninks]

2007 Yukon XL Denali with 6.2L 115k miles.. Generally I average about 12MPG the roads I drive are a mix of 55-70mph.
This last weekend pulling a 5k Travel Trailer, averaged 10.5MPG.

I hear there is a tuning mod that can help with MPG depending on your driving habits but I have not looked into it yet.

 

[Joseph Schroer]

I know they say if you're buying a big SUV you shouldn't care about the gas mileage but I'm not one of those. I would be quite interested to know what our courageous buyers are seeing especially on the 5.3L. Trips, combined city highway, from the DIC or hand calculated all will be appreciated. How fast you drive, load of vehicle, etc.

 

[Joseph Schroer]

2016 Suburban, 62000 miles, from the DIC Lifetime = 18.8, a highway trip is usually 21 - 21.5

 

[Docknow]

I know they say if you're buying a big SUV you shouldn't care about the gas mileage but I'm not one of those. I would be quite interested to know what our courageous buyers are seeing especially on the 5.3L. Trips, combined city highway, from the DIC or hand calculated all will be appreciated. How fast you drive, load of vehicle, etc. the more info the better.

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.

 

[Terry Hurlburt]

We have two Denali’s with the 6.2 liter. The 2014, with the 6 speed transmission gets 15-16 mpg on the highway and 12-13 around town. The 2018, with the 10 speed transmission gets 21 to 24 on the highway at 75. In town it gets 13-25 generally.
The 2018 is the best highway/trip vehicle I have ever owned. Smooth, comfortable and powerful.