LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

What Octane Fuel Do You Use?

Thread Tools
 
Search this Thread
 
Old Apr 13, 2009 | 07:19 PM
  #1  
beznich's Avatar
Thread Starter
Launching!
 
Joined: Apr 2009
Posts: 233
Likes: 0
From: Boston, MA
Default What Octane Fuel Do You Use?

Simple enough question I think, but I am curious to see what everyone is using.
Reply
Old Apr 13, 2009 | 07:25 PM
  #2  
DP 08 GXP's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Apr 2009
Posts: 1,592
Likes: 0
From: Northwest, OH
Default

shell 93 everytime

Last edited by DP 08 GXP; Apr 14, 2009 at 02:12 PM.
Reply
Old Apr 13, 2009 | 07:26 PM
  #3  
20SS07's Avatar
TECH Fanatic
 
Joined: Jul 2007
Posts: 1,115
Likes: 0
From: Reading, Pennsylvania
Default

92 or 93. Depends what station I go to not all stations around here have 93. The first couple months with the car I used 89.
Reply
Old Apr 13, 2009 | 07:28 PM
  #4  
bugzy530's Avatar
Staging Lane
iTrader: (1)
 
Joined: Feb 2009
Posts: 63
Likes: 0
Default

93 my car would do the shimmy if i put anythin else
Reply
Old Apr 13, 2009 | 07:33 PM
  #5  
NHRAMAN's Avatar
TECH Senior Member
iTrader: (1)
 
Joined: Apr 2005
Posts: 8,807
Likes: 0
From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Question

Due to your lower compression, 91 Octane would be as good as 93....really.[your compression is 9:1 or so,isn't it???]
Reply
Old Apr 13, 2009 | 07:44 PM
  #6  
20SS07's Avatar
TECH Fanatic
 
Joined: Jul 2007
Posts: 1,115
Likes: 0
From: Reading, Pennsylvania
Default

Originally Posted by bugzy530
93 my car would do the shimmy if i put anythin else
My car ran fine on 89. A buddy of mine who has an 06 Imp SS has actually never used anything other than 87 and has never had any issues.
Reply
Old Apr 13, 2009 | 07:54 PM
  #7  
beznich's Avatar
Thread Starter
Launching!
 
Joined: Apr 2009
Posts: 233
Likes: 0
From: Boston, MA
Default

I have run everything from 87 - 93 and never really noticed a difference until we made some tuning changes and leaned her out a bit and now I need to run 93.

NHRAMAN the 5.3 LS4 is 10:1 Compression which I think means that premium fuel would be needed or atleast recommended, but in the manual it say 87.

Now I know in the HP Tuner it has fuel and timing curves for both low and high octane fuel, but doesn't specify what low or high really means.
Reply
Old Apr 13, 2009 | 08:00 PM
  #8  
bugzy530's Avatar
Staging Lane
iTrader: (1)
 
Joined: Feb 2009
Posts: 63
Likes: 0
Default

Originally Posted by 20SS07
My car ran fine on 89. A buddy of mine who has an 06 Imp SS has actually never used anything other than 87 and has never had any issues.
I put 93 since i had the tune on my car. I put in 87 the first day i got the car and it ran ok then, maybe because i wasnt use to the power but now since the tune only 93, i also find that the other gases burn faster in this car, 93 gives me some hope that the gas is able to last for the week
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Apr 13, 2009 | 08:16 PM
  #9  
72gp's Avatar
Teching In
15 Year Member
 
Joined: Jan 2009
Posts: 49
Likes: 0
From: Cleveland
Default

Sunoco 94
Reply
Old Apr 13, 2009 | 08:30 PM
  #10  
NHRAMAN's Avatar
TECH Senior Member
iTrader: (1)
 
Joined: Apr 2005
Posts: 8,807
Likes: 0
From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Thumbs up

Originally Posted by beznich
I have run everything from 87 - 93 and never really noticed a difference until we made some tuning changes and leaned her out a bit and now I need to run 93.

NHRAMAN the 5.3 LS4 is 10:1 Compression which I think means that premium fuel would be needed or atleast recommended, but in the manual it say 87.

Now I know in the HP Tuner it has fuel and timing curves for both low and high octane fuel, but doesn't specify what low or high really means.
I didn't realize the comp. was that high.......
Reply
Old Apr 13, 2009 | 09:07 PM
  #11  
Mels SS's Avatar
TECH Junkie
iTrader: (1)
 
Joined: Jun 2007
Posts: 3,159
Likes: 0
From: New Orleans La
Default

93 Octane!!
Reply
Old Apr 13, 2009 | 09:38 PM
  #12  
Nacho SS's Avatar
TECH Junkie
iTrader: (4)
 
Joined: Feb 2007
Posts: 3,560
Likes: 0
From: 805-818
Default

100 octane race gas (unleaded) when it counts....and tune for it!
Reply
Old Apr 13, 2009 | 10:48 PM
  #13  
Panther427's Avatar
TECH Fanatic
 
Joined: Feb 2009
Posts: 1,401
Likes: 1
Default

91 since i have a tune. before i was running 85. Altitude = lower avalible octane ratings
Reply
Old Apr 13, 2009 | 11:07 PM
  #14  
Corny40's Avatar
TECH Resident
iTrader: (7)
 
Joined: Feb 2007
Posts: 800
Likes: 0
From: Houston
Default

Beznich, have you posted any info about your exterior mods. I'd love to see more pics of your car. It's obvious you have a Monte front bumper, but not so sure what kind of rockers those are????

Looks great either way!
Reply
Old Apr 13, 2009 | 11:14 PM
  #15  
GrandMan's Avatar
Staging Lane
 
Joined: Jul 2008
Posts: 70
Likes: 0
From: Denver
Default

I run 85 almost exclusively. Less oxygen up here. GXP has about 23k on it, no problems at all (other than the freaky-deaky rear tire camber wear).
Reply
Old Apr 14, 2009 | 03:07 AM
  #16  
williamGT's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Jul 2008
Posts: 1,467
Likes: 0
From: Yellowknife NT Canada
Default

I use 91
Reply
Old Apr 14, 2009 | 09:15 AM
  #17  
Sittingmongoose's Avatar
TECH Resident
iTrader: (1)
 
Joined: Sep 2008
Posts: 898
Likes: 1
From: Philly
Default

93 and tuned for it here
Reply
Old Apr 14, 2009 | 09:19 AM
  #18  
06MonteSS's Avatar
LS1Tech Sponsor
20 Year Member
Photogenic
 
Joined: Dec 2005
Posts: 2,932
Likes: 12
From: CT
Default

Mobil 93 all the time...
__________________
06MonteSS / DiabLew Tune

2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
Reply
Old Apr 14, 2009 | 09:52 AM
  #19  
radorider03's Avatar
Launching!
 
Joined: Apr 2005
Posts: 283
Likes: 0
From: Springfield MO
Default

94 or 91 depending on where i go
Reply
Old Apr 14, 2009 | 10:24 AM
  #20  
ImpSS07's Avatar
TECH Resident
iTrader: (3)
 
Joined: Feb 2009
Posts: 933
Likes: 0
From: Houston, Tx
Default

Originally Posted by beznich
I have run everything from 87 - 93 and never really noticed a difference until we made some tuning changes and leaned her out a bit and now I need to run 93.

NHRAMAN the 5.3 LS4 is 10:1 Compression which I think means that premium fuel would be needed or atleast recommended, but in the manual it say 87.

Now I know in the HP Tuner it has fuel and timing curves for both low and high octane fuel, but doesn't specify what low or high really means.
Your manual says 87? That's odd cause I'm almost certain that mine says Premium Gas only. I use to run 87 till I put my first tank of 93 in and now if I go back down to 87 it'll kick and scream untill she's empty.
Reply



All times are GMT -5. The time now is 05:53 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE