What does your MPG look like?

[SpThomass]

For starters I have a 2006 GMC Yukon denali XL, with a 6.0 LQ4 and it just went passed 216k miles.

Normally I drive it like a 6 liter V8 should be driven haha but with everything going on I’ve been taking it easy cause money is a little tight lately. Anyways, I used to get around 12 mpg now I’m pushing 16, with a 500 mile range on a full tank.

My question is; is that good or about normal? And also what do you guys get? Any tips for me to raise it past 16 mpg?

thanks in advance!

 

[RaiderRodney]

16 on a NBS is pretty decent. I usually get around 15-16 with my 01 5.3 Hoe and I try not to drive as aggressively as I do my DSMs. I also live in the mountains of NC so it can fluctuate quite a bit if I don't have some highway miles in there and have been pulling up mountains on small trips. Outside of tuning, I doubt you'll see much better than 16.

 

[S33k3r]

16 is awesome! I *wish* I could get that. 10.8 is what I see on my 2005 Suburban 2500; it's got the 6.0 and 3.73 gears and is a 4x4, however.

 

[Mudsport96]

Depends who is driving the Tahoe. 06 5.3 4l60 3.42s, if my wife drives it say to Walmart and back (25 mile round trip) she gets 14-15. I do the same trip I get 17-18. She took the daughter to cheerleading camp 114 mile round trip and got 17 mpg. I picked her up at the end of the week and knocked down 19.5 ( was averaging 20 till construction zone).

 

[Dantheman1540]

16 is really good for city driving, especially with that many miles. I get 14-16 city and can squeak 18 on the highway with a modded and tuned 6.0 on 93.

 

[swathdiver]

Depends who is driving the Tahoe. 06 5.3 4l60 3.42s, if my wife drives it say to Walmart and back (25 mile round trip) she gets 14-15. I do the same trip I get 17-18. She took the daughter to cheerleading camp 114 mile round trip and got 17 mpg. I picked her up at the end of the week and knocked down 19.5 ( was averaging 20 till construction zone).

Looks like our wives went to the same driving school! LOL

 

[BlackedOutHoe]

16 is really good for city driving, especially with that many miles. I get 14-16 city and can squeak 18 on the highway with a modded and tuned 6.0 on 93.

I get similar MPG with a tuned 5.3 on 93 with 3.73 gears.

 

[Dantheman1540]

I get similar MPG with a tuned 5.3 on 93 with 3.73 gears.

twinzies

 

[Joseph Garcia]

Looks like our wives went to the same driving school! LOL

Not my wife! The only way that I can get better mileage than my wife is to leave the truck in the portable shelter.

 

[BlackedOutHoe]

twinzies

Except yours is probably much more fun to drive!

 

[bobsburban]

Hoping this week's tuneup will net some more mileage but so far, 14 around town is about all I've gotten; 10-11 pulling the trailer. Haven't gotten out on the road as yet so I'm planning something this weekend that will put 150 or so highway miles on it to get some kind of a baseline.

 

[Onebad1983]

05 5.3 Yukon 2WD 3.73s I averaged 16 on a 300 something mile trip to Biloxi and around 13 in town

 

[JAXN]

2006 Tahoe. 5.3 with 3.73 rear. Average 14-15 mpg around town. 17 highway. 10 mpg towing the camper. Can't complain.

 

[PNWYukon]

According to the DIC we get a steady 16.7 mpg. 2005, 4x4, 5.3L V8.

 

[Danny3737]

I average 13-15 city and up to 19 on the highway. The smoother the right foot, the better the mileage. The funny thing is it’s gets almost the same MPG as my work vehicle 2019 Ford Explorer 4WD, V6

 

[BentleyArnage]

'99 **. Last tank just registered 15. Lockup is inop, may have wrong plugs(what came in it, bought 2 weeks ago). About 50 miles with the trailer attached. Some hwy, some town. I'll report next week on improvements.

 

[nick0789]

2005 Z71 tahoe, 185k on the clock.
Average city driving: 15.5 mpg
Average highway driving: ~ 17 mpg

The highways around me are mostly 70 mph, but if I’m on a backcountry highway (55-60 mph), I can push close to 20 mpg.

 

[S33k3r]

Strictly physical things that can affect gas mileage:

Engine Size (5.3 vs 6.0) and use
Engine tune/configuration and tune
Transmission
2WD/4WD/AWD
Final Drive ratio (3.42/3.73/4.10/etc.)
Wheel and tire size (31/33/35/etc.)

And non- physical things:
How you drive it
Traffic
landscape and/or elevation

Anyone think of anything else?

 

[SpThomass]

Sorry for the late reply after creating the thread. But all in all you guys get pretty good mileage. I haven’t towed anything yet, tbh I’m afraid too haha.

Another thing I’ve noticed about mine that you guys have mentioned is, mine doesn’t have variation at all. Like after a day or two it will go from 15.8 to 15.9, for example when I’m on the highway (which is atleast 60% of my daily commute) it doesn’t go up at all. You guys mentioned 17/18/19 on the highway so I wonder why mine doesn’t do that.

Another question I have to you guys, when I fill my tank about it only fills about 22-23 gallons however on google and the build list it says a 32.5 gallon tank.. any thoughts on this?

thanks guys I like reading what you guys have to say !

 

[S33k3r]

As far as I know, you should have the standard, 26 gallon tank. Some Yukon XLs and Suburbans got an auxiliary tank that added ~11 gallons to the mix, but it sounds like your did not. So what you are looking at is about 3 - 4 gallon reserve. Gives you a range of over 300 miles at your gas mileage. Not bad. My QS Suburban gets 11ish -- on the highway -- but I have the auxiliary tank, so I have a 350ish mile range. Estimated ranges are before reserve fuel is touched.