Third Generation F-Body Message Boards

Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

What kind of mpg can I expect

Thread Tools
 
Search this Thread
 
Old Oct 13, 2009 | 09:08 PM
Share
  #1  
MacG's Avatar
MacG
Thread Starter
Junior Member
 
Joined: Oct 2009
Posts: 6
Likes: 0
What kind of mpg can I expect
For a 90 rs 5 liter auto? City and Highway. What do you guys get?

Thanks,

MacG
Reply
0
Old Oct 14, 2009 | 12:17 AM
Share
  #2  
camaronewbie's Avatar
camaronewbie
Supreme Member
 
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: What kind of mpg can I expect
Mine got 30 hiway before I swapped the 2.73 peg leg out.
Reply
0
Old Oct 14, 2009 | 08:32 AM
Share
  #3  
Atilla the Fun's Avatar
Atilla the Fun
On Probation
 
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: What kind of mpg can I expect
My '91 RS 5 liter auto averaged 23 mpg, both with the stock 2.73:1 axle gearing, and even after I went to 3.42:1 gears and recalibrated the speedometer. With the stock gears, I once saw as high as 29 mpg on a long trip.
Reply
0
Old Oct 14, 2009 | 11:11 PM
Share
  #4  
MacG's Avatar
MacG
Thread Starter
Junior Member
 
Joined: Oct 2009
Posts: 6
Likes: 0
Re: What kind of mpg can I expect
Originally Posted by Atilla the Fun
My '91 RS 5 liter auto averaged 23 mpg, both with the stock 2.73:1 axle gearing, and even after I went to 3.42:1 gears and recalibrated the speedometer. With the stock gears, I once saw as high as 29 mpg on a long trip.
Thanks for the input!
Reply
0
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Camaro electrically dies when an attempt to start is made
Gunner242
Electronics
7
Dec 25, 2015 04:49 PM
HP increase with flat top & RV cam
hartsmike
Engine Swap
11
Oct 2, 2015 07:11 AM
Swaping transmissions how much of a diffrence will it make
Zeek1041
Theoretical and Street Racing
12
Sep 30, 2015 11:00 AM
Was trying to find fuel pump relay. Now, no oil pressure
j00sh
TPI
1
Sep 27, 2015 09:49 AM
Gurus, could this be right?
James Sutton
Interior
1
Sep 23, 2015 02:18 PM
Back to Subforum
Tech / General Engine
View Next Unread
help i need to know what kind of heads i can put on my car to gain the hp up




Advanced Search

All times are GMT -5. The time now is 02:23 AM.