[casey97z71]

Post up your MPG. I know this topic has been covered before, but I am just curious and don't want to go digging. Post your engine, mods, tire size and gear ratio, as well as anything else that might affect your mileage...

I just drove 230 miles back to school in my 86 K5 with a 350TBI, 36s and 4.10s, averaged about 75 mph and got just under 13 mpg the whole way... I have yet to fill it up after driving an "in town" tank, and am kinda worried about how bad it will be.

Post away!

 

[HoveyBayou]

NBS ECSB 5.3l 4x4
6" lift, 285s

15.5 - 16.0 - mixed driving

 

[camdenoilchange]

15mpg with 3.42 gears and 33x12.50x17 in the city. not sure with new gears, just got them and going to 37's with 4.56

 

[Phil]

I'm gunna guess around 10 mpg

 

[Daniel]

15-16 75% city

1995 tbi v6 on 33s

yes once you mod a v6 gas mileage drops a lot

 

[vic_V8]

91 350 5 speed, electric fan, random engine mods, 3.73, 265 tires, etc.

17-20 mpg city/country mix driving

 

[HoveyBayou]

91 350 5 speed, electric fan, random engine mods, 3.73, 265 tires, etc.

17-20 mpg city/country mix driving

Makes me want a standard.

 

[Denaliano]

12.3MPG City only driving for me with 6.0L AWD/NVG149 4.10's 5800lbs 275/55/20's

 

[Megalos]

half-ton ecsb 4x4, 5.3 L33 engine, 6" lift, 35" tires that actually measure 33.4", 4.56 gears, predator tune, borla muffler, full toolbox
I get about 13 whether I'm in the city or on the highway. IMO i'm a little overgeared, but the next set of tires I get will be a more true 35" tire. I also drive a little too fast.

 

[bub]

they say 16 to 20
5.3L, 3.73's, sagging bars, 245/75/16

 

[bggrnchvy]

The last tank through the truck I calculated a grand total of 6mpg, sweet!

When I was driving it regularly it was getting 11.

 

[justinp95]

~12mpg city. Just got a tune and i think im getting ~15mpg now. 1500HD 6.0 3.73s & 35s.

 

[cooldude960]

8-9mpg

 

[bub]

8-9mpg

wow not bad at all

 

[RRPZ]

12-13 everday driving. Including hauling a 3500lb water tank in the bed for some 15% of the miles. 95 chev 350, 38" rubber, 12" lift, 456 gears.

 

[RRPZ]

12-13 everday driving. Including hauling a 3500lb water tank in the bed for some 15% of the miles. 95 chev, 350 auto, 12" lift, 38" rubber, 456 gears.

 

[StrokerAce03]

About 18.5 mixed city/highway with the truck and mods listed in sig.

 

[MaXXis85]

2006 Z71 5.3, 3.42's, 305 buckshots.
14 ish in town. 15.5-16 on the highway.
BTW my new exhaust has helped improve MPG .5-1 MPG gain. I will soon put a k&n.

 

[justinp95]

2006 Z71 5.3, 3.42's, 305 buckshots.
14 ish in town. 15.5-16 on the highway.
BTW my new exhaust has helped improve MPG .5-1 MPG gain. I will soon put a k&n.

What are the details on the exhaust?

 

[silver98Z71]

'98 K1500
355ci L31
3.42s in pumpkin
on 35s

Mods: Shorty pieces of shit (headers)
true dual Flows

Uh, 9-10 in town and 12-14 on the interstate (downhill).