What does your MPG look like?

[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.