GMC Truck Forum banner
1 - 20 of 39 Posts

·
Registered
Joined
·
1,829 Posts
Discussion Starter · #1 ·
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!
 

·
Weird Turns Pro.
Joined
·
6,252 Posts
I'm gunna guess around 10 mpg
 

·
Registered
Joined
·
279 Posts
91 350 5 speed, electric fan, random engine mods, 3.73, 265 tires, etc.

17-20 mpg city/country mix driving
 

·
Registered
Joined
·
6,840 Posts
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.
 

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

·
Giggity Giggity Giggity
Joined
·
3,169 Posts
About 18.5 mixed city/highway with the truck and mods listed in sig.
 

·
Bayou Surface Drive, LLC
Joined
·
7,077 Posts
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.
 

·
Registered
Joined
·
604 Posts
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?
 

·
DeepSouth Gangster
Joined
·
5,669 Posts
'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).
 
1 - 20 of 39 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top