PerformanceTrucks.net Forums

Notices
GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Does Anyone Get Good Gas Mileage Out of a 4.8L?

Thread Tools
 
Search this Thread
 
Old 04-11-2011, 08:32 AM
  #21  
TECH Resident
iTrader: (1)
 
slpsilverado's Avatar
 
Join Date: Jun 2010
Location: Lexington, TN
Posts: 761
Likes: 0
Received 1 Like on 1 Post
Default
Originally Posted by jeffz0rz
this makes me hate having the 5.3 im getting around 14 on a good day. wtf ?
What mods do you have? This is TERRIBLE for a 5.3. I get 18 consistently, with about 80% highway miles.
slpsilverado is offline  
Reply Like
Old 04-11-2011, 08:52 AM
  #22  
Teching In
 
RST2uner44's Avatar
 
Join Date: Dec 2010
Location: Long Island
Posts: 35
Likes: 0
Received 0 Likes on 0 Posts
Default
I get around 18 mixed with my rst.
RST2uner44 is offline  
Reply Like
Old 04-11-2011, 10:09 PM
  #23  
TECH Resident
 
Join Date: Aug 2008
Location: East of the east bay CA
Posts: 842
Likes: 0
Received 0 Likes on 0 Posts
Default
I get about 20-21mpg I do mostly 90% highway driving. Not to sure now that I put the higher stall in.
Chris05 is offline  
Reply Like
Old 04-12-2011, 09:18 PM
  #24  
Launching!
iTrader: (2)
 
usmc3521's Avatar
 
Join Date: Mar 2010
Location: Rock Springs, WY
Posts: 221
Likes: 0
Received 0 Likes on 0 Posts
Default
I averaged mine before the stall. It was just shy of 24MPG highway of course. Now I just can't keep my foot out of it.
usmc3521 is offline  
Reply Like
Old 04-12-2011, 10:30 PM
  #25  
TECH Regular
iTrader: (2)
 
jiar577's Avatar
 
Join Date: Nov 2008
Posts: 449
Received 0 Likes on 0 Posts
Default
Originally Posted by jeffz0rz
this makes me hate having the 5.3 im getting around 14 on a good day. wtf ?
That's exactly what I get consistently with my 5.3, but I drive 80% of the time on the city. The few times I hit the highway I average 17-18mpg.

The sad thing is it'll get worse soon (hopefuly)...
jiar577 is offline  
Reply Like
Old 04-16-2011, 07:58 AM
  #26  
Teching In
 
Woodlandcritter's Avatar
 
Join Date: Dec 2010
Location: sfla
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
Default
i towed a bronco on 40" tires on a carhauler and got 11.5 mpg with the 4.8. dry i get 18. sclb cai exh hp tune by me, not quite right yet. soon to have MAGNACHARGER and a shot trans
Woodlandcritter is offline  
Reply Like
Old 04-16-2011, 04:35 PM
  #27  
dug
Banned
Thread Starter
iTrader: (10)
 
dug's Avatar
 
Join Date: Aug 2002
Location: Phoenix
Posts: 3,727
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by usmc3521
I averaged mine before the stall. It was just shy of 24MPG highway of course. Now I just can't keep my foot out of it.
the 4.56 really wakes it up dont it? Which stall did you go with?
dug is offline  
Reply Like
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
While we are reviewing cams.....
DrX
FORCED INDUCTION
31
08-19-2015 04:45 PM
03 4.8l 4l80E swap: TCI Flex Plate 399754 Snout Extender?
lycominghunter
GM Drivetrain & Suspension
5
07-29-2015 04:24 PM
Anyone convert to an LS7 MAF?
V-seriesTech
GM Engine & Exhaust Performance
2
07-28-2015 12:28 PM
Help finding a 2500HD tune for OSID 12617631 for HPTuners ASAP
oharajo
Tuning, Diagnostics, Electronics, and Wiring
2
07-18-2015 09:24 PM
Install: Flowmaster American Thunder Cat-back Exhaust for 2004-2006 Chevy/GMC 1500
FlowmasterMufflers
GM Engine & Exhaust Performance
0
07-17-2015 03:26 PM
Tags
Back to Subforum
GM Engine & Exhaust Performance
View Next Unread
Factory E-fan current testing (response to the "E-Fans suck" thread)




Advanced Search
Quick Reply: Does Anyone Get Good Gas Mileage Out of a 4.8L?


Reply Closed Thread Share

All times are GMT -5. The time now is 07:09 PM.