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Discussion Starter #1
What are some of you getting for mileage with your 5.3? I calculated 17.7 this morning and my Z85 4x4 is totally stock with no mods. That's around town driving, some highway combined. I figured that's probably right around where it should be since it's rated at 14/19. Anyone getting higher mileage figures?
 

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city=15/16 hwy= 22/25 love that 3:42 gear
 

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19 on the highway at 80mph.
12 around town (yeehaw turbo power!)
 

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I consistently get 14 MPG in town/city and that's 100% stop-n-go residential, traffic lights, no loop driving at 60 mph, etc. The second I might reach 35-40 mph, gotta stop again.

Only been out of town highway driving once....1K round trip TX to OK and back. 16 MPG going pulling a tandem axle 6X12 enclosed UHaul loaded with books and cruise set at 65 mph....21 MPG return trip no load cruise set at 75 mph (3.73 gears).
 

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18 mixed driving, 22 all highway.
 

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Discussion Starter #9
I average just under 18mpg. Tuned folks get up to 22mpg i think. But tune voids warranty... kinda sucks.
Yep---I definitely won't be doing any tunes with mine--I purchased the 4yr/48,000mi warranty as an add-on since the 3/36,000 factory warranty had expired.
I have the 3.42 in mine.

I'm doing a trip tomorrow, so I'll calculate it again---probably should get something closer to 19 with it on the highway, I would think.
 

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crew cab 4x4 w/ 4.10's the best i've ever seen is 18.5, doing about 100km/h. That's with an efan, no rear cats and 91 octane. Around the city it's usually 15-17 in summer and 13-15 in winter. I'm getting a custom tune on Friday, i'll see what I get after that.
 

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I do 16.5-17.5 pretty consistently around town (most of my driving) and around 21-22 on the highway at 75+. I have a PTB and tune (Premium) only on a 2010 CC with 3.42 gears.
 

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Discussion Starter #12
The 17.7 I got was with a pretty light foot, too. If my foot is in the gas tank, I see that number dropping way down :eek:
 

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I'm 12-13 in city and ~18.5 highway @ 80
 

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Summer, around ~20. Winter around ~18. Heavy foot, mixed driving.
Tuned for 93 super, 2.5 dual exhaust, CAI straight tube, PTB. Heavy stereo/speakers. 90K+ miles.
 

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I've been averaging 18, mix of city and highway.
 

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im averaging 14.. i only drive 65 on the highway.. i think thats extremely low..
 

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Yep---I definitely won't be doing any tunes with mine--I purchased the 4yr/48,000mi warranty as an add-on since the 3/36,000 factory warranty had expired.
I have the 3.42 in mine.

I'm doing a trip tomorrow, so I'll calculate it again---probably should get something closer to 19 with it on the highway, I would think.
There are still plenty of bolt on mods that will not void your warrenty and improve your MPG
 

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I'm going to recheck min on the way to the NESM fri. see if
there's any change since my 93 oct dyno tune.
 

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im averaging 14.. i only drive 65 on the highway.. i think thats extremely low..
Yes it is! Is that city/highway combined?
 
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