Will Lower Octane Cause Detonation on Dyno Tuned GTO - LS1GTO.com Forums

Vendors


Go Back   LS1GTO.com Forums > GTO Tech > Tuning/Dyno Results

Reply
 
Thread Tools Rate Thread
Old 12-24-2012, 09:34 PM   #1
UsernameGTOwastaken
Registered User
 

Join Date: Dec 2012
Location: New York
Posts: 2


Offline
Smile Will Lower Octane Cause Detonation on Dyno Tuned GTO

Hey guys, I actually just made an account to post this because I am a little confused and I don't know much about goats. So I have a 2004 Pontiac GTO, 6 speed. It has a few modifications such as an intake, a full exhaust and it was dyno tuned (not by a handheld tuner). However, I have no idea what kind of tune it was because it was done by the previous owner. I assume it's some sort of 93 octane performance tune. My questions is if I, for whatever reason, put 87 or 89 octane in the car, will it cause detonation? Or, will the knock-sensors still be able to save the engine? I know that on the stock tune, the knock-sensors kick in and retard the engine timing (there-by hindering the performance), but would a dyno tune get rid of that fail-safe??

And I know I should run premium only, but I am quite clumsy and will most likely fill up on 87 or 89 one day and not realize until I'm leaving the gas station. I just want to know how bad it can get.

Any input will be greatly appreciated. Thanks in advance!
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-24-2012, 09:40 PM   #2
dreadpirateroberts
anybody seen staypuft?
 
dreadpirateroberts's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 21,394
Premium Member


Offline
A dyno tune CAN affect how spark advance is pulled due to knock. If your tuner didn't mess with the tables associated with knock retard or the low octane spark table, you should be ok.
  Reply With Quote Quick reply to this message
Old 12-24-2012, 09:45 PM   #3
high school goat
Retarded Spark
 
high school goat's Avatar
 
2004 GTO Owner

Join Date: Jan 2008
Location: Charlotte N.C.
Posts: 2,809


Offline
Send a message via AIM to high school goat
Maybe you shouldn't own the car if you can't remember to put the right gas in it....
__________________
SOLD
  Reply With Quote Quick reply to this message
Old 12-25-2012, 01:21 AM   #4
TeamLS1
Australian Body American V8
 
TeamLS1's Avatar
 
2004 GTO Owner

Join Date: Mar 2009
Location: Houston, Texas
Posts: 815


Offline
The fail safe is the sticker on the inside of your fuel tank door, 93 and up only please!
__________________


BBM Monaro | Billet | 18's | SAP Skirts | VX | Kooks | Corsa | Comp | Lunati | K & N | 243 | LS2 MAF | Monster 2 | Powerbond | 415/385

Built and Tuned by After Hours Performance - pm for info

2004 Magnetic Red Corvette A4 Targa | Stock

2011 Synergy Green Metallic Camaro SS Hurst

http://www.youtube.com/watch?v=OqrNG...ature=youtu.be

http://s557.photobucket.com/home/TeamLS1/index

http://www.flickr.com/photos/100702796@N05/
  Reply With Quote Quick reply to this message
Old 12-25-2012, 02:16 AM   #5
HunterKiller89
Ecotec tech
 
HunterKiller89's Avatar
 
2004 GTO Owner

Join Date: Nov 2009
Location: San Fernando Valley (Los Angeles area)
Posts: 2,126


Offline
Send a message via AIM to HunterKiller89
$5-$7.50 extra to fill up on a $70 tank, and a big red sticker...two reasons to never use 87/89
__________________
Cars are nothing more than complicated chemistry problems that burn gasoline and turn it into a complicated physics problem.
  Reply With Quote Quick reply to this message
Old 12-25-2012, 02:48 AM   #6
DoomDevil
~СЛАВА ГЕРОЯМ~
 
DoomDevil's Avatar
 
Lumina SS

Join Date: Oct 2011
Location: Saudi Arabia
Posts: 243
Premium Member


Offline
Quote:
Originally Posted by jpvulpes...View Post
A dyno tune CAN affect how spark advance is pulled due to knock. If your tuner didn't mess with the tables associated with knock retard or the low octane spark table, you should be ok.

^ +1

Your PCM will do magic in preventing knock and detonation. But, if the tuner has played with the timing, or the "low octane" spark tables, or even worse; desensitized your knock sensors! Then yeah, cheesy fuel can cause issues.

Take this ---> Lowest octane we sell is 91 (premium, unleaded) for $1.8/gallon, and 95 octane for $2.4/gallon!!! Full tank of premium unleded 95 for just $11!!! Gotta love this place!
__________________

96 Suzuki X-90
03 Lumina SS Coupe (stock "cat-less" & "built trans!")
03 Lumina SS Coupe (393 whp, LS1, bolt-on's and cam)
07 Toyota Aurion (270 hp and a 6-spd AT)
12 VW Tiguan Highline Sport (for driving the wife and my little girls!)
  Reply With Quote Quick reply to this message
Old 12-25-2012, 06:09 AM   #7
svede1212
Growing up is an option
 
svede1212's Avatar
 
2004 GTO Owner

Join Date: Feb 2004
Location: Grand Rapids, Michigan
Posts: 16,143
GVHJ4N
Premium Member


Offline
It certainly isn't a good idea to run low octane. Yes, after detecting knock for a while the PCM will start subtracting timing until it quits but in the mean time your engine is knocking and potentially causing damage. I run 93 and 91 is the lowest I would put in. Not remembering when you fill up is the first sign you'll be one of those old people that confuse the gas pedal and brake and your GTO will end up in the middle of the convenience store and on the news.
__________________
.




"It's a well know fact that after you hit 400 HP you have to go with split dual exhaust like the LS2 GTOs. The '04s could get away
with single side because they were only 350 HP. With 400 HP and beyond the car wants to turn right at WOT from the thrust."
  Reply With Quote Quick reply to this message
Old 12-25-2012, 06:25 AM   #8
eli
edmunds.com
 
2005 GTO Owner

Join Date: Jun 2005
Location: NH
Posts: 291


Offline
fuel door & factory & manual does not say 93 and over is required, only that 91+ is recommended, and that 87 is supported too.
87 octane is in fact fine for LS1 & LS2 and is *supported* by stock tune if you can deal with warm weather power loss due to occasional timing backoff.
I've run 87 all winter for decades and a few hundred thousand miles on GTO & Z28 V8s for which 91+ is recommended (but not required).
with these vehicles, mpg *improves* with 87 octane on long cruises compared to 91+.

take the savings to the bank and buy new suspension components with it, trust me you will need them .. :|

it's especially nice when 87 octane is $3.35 and 91+ octane is bizarrely much more like $3.99 or whatev.

my opinion: no matter what the nonfactory tune is supposed to do or not do,
if you want to run 87 octane, then return tune to stock.

Merry Christmas yall.
  Reply With Quote Quick reply to this message
Old 12-25-2012, 07:59 AM   #9
ddawson
Purple Administrator
 
ddawson's Avatar
 
2004 GTO Owner

Join Date: Aug 2004
Location: San Mateo, Bay Area, CA.
Posts: 12,804
Premium Member


Offline
20 Cent difference at 17 gallons is the cost of going to Starbucks for a Tall Latte.

If you want to know for sure have someone with HP tuners look at the High and Low table.
__________________
1969 Corvette, 427 Convertible
1988 Mazda RX7 Convertible
2000 Volvo C70 Convertible
2011 Mazda 2 Touring
2014 Subaru Outback Limited
  Reply With Quote Quick reply to this message
Old 12-25-2012, 11:35 AM   #10
DoomDevil
~СЛАВА ГЕРОЯМ~
 
DoomDevil's Avatar
 
Lumina SS

Join Date: Oct 2011
Location: Saudi Arabia
Posts: 243
Premium Member


Offline
Quote:
Originally Posted by eli...View Post
fuel door & factory & manual does not say 93 and over is required, only that 91+ is recommended, and that 87 is supported too.
87 octane is in fact fine for LS1 & LS2 and is *supported* by stock tune if you can deal with warm weather power loss due to occasional timing backoff.
I've run 87 all winter for decades and a few hundred thousand miles on GTO & Z28 V8s for which 91+ is recommended (but not required).
with these vehicles, mpg *improves* with 87 octane on long cruises compared to 91+.

take the savings to the bank and buy new suspension components with it, trust me you will need them .. :|

it's especially nice when 87 octane is $3.35 and 91+ octane is bizarrely much more like $3.99 or whatev.


my opinion: no matter what the nonfactory tune is supposed to do or not do,
if you want to run 87 octane, then return tune to stock.

Merry Christmas yall.

Great! Now, all he needs is to keep saving for the next 76 years and he might be able to afford some bushings with his savings! LOL
  Reply With Quote Quick reply to this message
Old 12-25-2012, 11:51 AM   #11
HunterKiller89
Ecotec tech
 
HunterKiller89's Avatar
 
2004 GTO Owner

Join Date: Nov 2009
Location: San Fernando Valley (Los Angeles area)
Posts: 2,126


Offline
Send a message via AIM to HunterKiller89
Quote:
Originally Posted by DoomDevil...View Post
Great! Now, all he needs is to keep saving for the next 76 years and he might be able to afford some bushings with his savings! LOL

lol, this
it would take a year (assuming filling up once a week) to buy 2-3 bushings, and they'd have to be cheaper ones
  Reply With Quote Quick reply to this message
Old 12-25-2012, 03:02 PM   #12
redtan
Registered User
 
redtan's Avatar
 
2006 GTO Owner

Join Date: Jun 2007
Location: Boston
Posts: 4,492


Offline
Quote:
warm weather power loss due to occasional timing backoff.

Occasional? There's an entire timing table dedicated to low octane fuel and it's quite significant.

And honestly, what's the point of buying a 400hp car only do choke it with low octane fuel and 350hp for a few measily dollars in savings? At 20 cents gallon savings that's $3 a fillup. On a normal 12k a year daily driver car, that comes out to about 4 fillups a month or $12/month.

If $12/month difference in gas bill makes or breaks your budget then you got bigger problems than running 87 octane in a V8 car.
__________________
Quote:
Originally Posted by Transmission Perform...View Post
The cylinder heads became deformed because the air filter was so dirty they couldnt handle all the build up of air and oil coming through the air filter and the throttle body so i tried replacing the air tube with a cold air intake and i think the extra power blew out the cylinder heads and they crashed through valley pan into the crank. Then the crank spun hard and threw the pistons up to hard to cause a misfire

  Reply With Quote Quick reply to this message
Old 12-25-2012, 05:41 PM   #13
dreadpirateroberts
anybody seen staypuft?
 
dreadpirateroberts's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 21,394
Premium Member


Offline
Quote:
Originally Posted by redtan...View Post
Occasional? There's an entire timing table dedicated to low octane fuel and it's quite significant.

And honestly, what's the point of buying a 400hp car only do choke it with low octane fuel and 350hp for a few measily dollars in savings? At 20 cents gallon savings that's $3 a fillup. On a normal 12k a year daily driver car, that comes out to about 4 fillups a month or $12/month.

If $12/month difference in gas bill makes or breaks your budget then you got bigger problems than running 87 octane in a V8 car.

Uh, OP said he's worried about a brain fart and accidently filling up with a lower octane, not because he's cheap.
  Reply With Quote Quick reply to this message
Old 12-25-2012, 09:30 PM   #14
UsernameGTOwastaken
Registered User
 

Join Date: Dec 2012
Location: New York
Posts: 2


Offline
Thank you ^

And thank you to all who put in helpful inputs, I was just worried because I used to own a Mustang which only needed 87...

I tried talking to the previous owner but he's a bit daft in remembering what exactly was "changed". I have no problem running 93. Before buying the car I knew that's one of the commitments you should make. Given, even if i don't put 93 in a stock GTO and put 89, it would probably run fine as DD and not as a track car or whatever. However, does anyone know how STRICT the requirement becomes when a car is dyno tuned? I know it depends a lot on the tune...but if I were to put 91...would it cause pinging/knocking/bogging/detonation??

Also, the previous owner said that after tuning the goat, he managed to get 22 city and 29 highway mpg. That's a pretty big jump from what the car is known to give... I haven't gotten a chance to fully test it, but, is this possible or was he just exaggerating? (he told me this after i had already bought the car and he was the owner not a dealer).
  Reply With Quote Quick reply to this message
Old 12-25-2012, 10:57 PM   #15
J Burna
The Peacemaker
 
J Burna's Avatar
 
2006 GTO Owner

Join Date: Aug 2007
Location: Ft. Lauderdale,Ft.Myers FL.
Posts: 1,116


Offline
Quote:
Originally Posted by jpvulpes...View Post
Uh, OP said he's worried about a brain fart and accidently filling up with a lower octane, not because he's cheap.

+2. This board of sharks are always sniffing for blood.
__________________
IBM 06 A4 1 of 278


Our hobby makes no sense honestly.
Steel Chicken
Not driving your GTO to keep miles off of it is like not having sex with your girlfriend so her next boyfriend will appreciate it more.
  Reply With Quote Quick reply to this message
Old 12-26-2012, 01:02 AM   #16
Afroman
06 Cyclone GTO
 
Afroman's Avatar
 
2006 GTO Owner

Join Date: Apr 2007
Location: Miami Beach, Florida
Posts: 2,283


Offline
Quote:
Originally Posted by UsernameGTOwastaken...View Post
Thank you ^

And thank you to all who put in helpful inputs, I was just worried because I used to own a Mustang which only needed 87...

I tried talking to the previous owner but he's a bit daft in remembering what exactly was "changed". I have no problem running 93. Before buying the car I knew that's one of the commitments you should make. Given, even if i don't put 93 in a stock GTO and put 89, it would probably run fine as DD and not as a track car or whatever. However, does anyone know how STRICT the requirement becomes when a car is dyno tuned? I know it depends a lot on the tune...but if I were to put 91...would it cause pinging/knocking/bogging/detonation??

Also, the previous owner said that after tuning the goat, he managed to get 22 city and 29 highway mpg. That's a pretty big jump from what the car is known to give... I haven't gotten a chance to fully test it, but, is this possible or was he just exaggerating? (he told me this after i had already bought the car and he was the owner not a dealer).

22 city mpg is higher than I ever get. I normally get between 19-20 in the city, and my worse was a single digit number... I have gotten in the low 30s on the highway. It really depends on traffic and your driving style.
Also I wish I could get a tank of 95 for 11 dollars!!!
__________________
2006 CGM A4 Gone but not forgotten.
2006 IBM M6 New GTO!
Quote:
Originally Posted by AlphaEden...View Post
you're quite the manwhore now aren't you

Quote:
Originally Posted by mike5215@bellsouth.n...View Post
Owing a GTO is like marrying a stripper. You know it's wrong and it's going to end badly, but the sex is so hot you can't help yourself.

Quote:
Originally Posted by Brians Goat...View Post
No he ain't doing no freaking manwhoring, he has a collar around his neck lately, he rarely shows up anymore on Saturday's and when he does he usually has some HOT babe with him who causes him to constantly drool and walk funny!!!!!!!

  Reply With Quote Quick reply to this message
Old 12-26-2012, 03:04 AM   #17
jmd
OLD GOAT
 
jmd's Avatar
 
2005 GTO Owner

Join Date: Nov 2006
Location: crime capital of SC
Posts: 5,244


Offline
yes, it is a problem.
__________________
2005 a4. slower than SoCar Goat.
  Reply With Quote Quick reply to this message
Old 12-26-2012, 03:22 AM   #18
redtan
Registered User
 
redtan's Avatar
 
2006 GTO Owner

Join Date: Jun 2007
Location: Boston
Posts: 4,492


Offline
Quote:
Originally Posted by jpvulpes...View Post
Uh, OP said he's worried about a brain fart and accidently filling up with a lower octane, not because he's cheap.

If you read my quote you'll realize I wasn't talking about the OP, but the cheapskate running 87 octane to save 3 bux a fillup
  Reply With Quote Quick reply to this message
Old 12-26-2012, 03:24 AM   #19
redtan
Registered User
 
redtan's Avatar
 
2006 GTO Owner

Join Date: Jun 2007
Location: Boston
Posts: 4,492


Offline
Quote:
Originally Posted by J Burna...View Post
+2. This board of sharks are always sniffing for blood.

The kids that don't know how to read are always coming on here making false accusations
  Reply With Quote Quick reply to this message
Old 12-26-2012, 05:53 AM   #20
dreadpirateroberts
anybody seen staypuft?
 
dreadpirateroberts's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 21,394
Premium Member


Offline
Quote:
Originally Posted by redtan...View Post
Quote:
warm weather power loss due to occasional timing backoff.

Occasional? There's an entire timing table dedicated to low octane fuel and it's quite significant.

And honestly, what's the point of buying a 400hp car only do choke it with low octane fuel and 350hp for a few measily dollars in savings? At 20 cents gallon savings that's $3 a fillup. On a normal 12k a year daily driver car, that comes out to about 4 fillups a month or $12/month.

If $12/month difference in gas bill makes or breaks your budget then you got bigger problems than running 87 octane in a V8 car.

Quote:
Originally Posted by redtan...View Post
The kids that don't know how to read are always coming on here making false accusations

It would help if you included the username and post ID in a quote. I apologize for not taking you seriously enough to consider it worth my time to look back through an entire thread to make absolutely sure of the context of what you were quoting when you didn't bother to be considerate enough to use this simple feature. The authors of vBulletin have generously provided a means to automatically include the username of the quoted poster and a link to the appropriate post.
  Reply With Quote Quick reply to this message
Old 12-26-2012, 05:57 AM   #21
Steel Chicken
Cthulhu's IT D1r3ktФя
 
Steel Chicken's Avatar
 
2004 GTO Owner

Join Date: Dec 2004
Location: Magrathea
Posts: 20,037
Premium Member


Offline
Its a performance car. Run high octane gas, all the time. PERIOD. As far as the crystal ball to tell you if it will detonate or not, I dropped it and it broke. IT DEPENDS. Only 11ty billion variables we don't know the values of.
__________________
2004 GTO, Stock LS1 internals, donkey dick cam, mega-ultron space heater @ 14PSI, ETP heads, exhaust thingies and other stuffs. 742 RAWRZORS.


Quote:
Justice is swift and unfair in the eyes of those who don't know shit. - tmiller

  Reply With Quote Quick reply to this message
Old 12-26-2012, 06:24 AM   #22
xtaspeed05
Abracadabra Holmes
 
xtaspeed05's Avatar
 
2005 GTO Owner

Join Date: Aug 2008
Location: San Jose, CA
Posts: 4,650
Premium Member


Online
Quote:
Originally Posted by UsernameGTOwastaken...View Post
Thank you ^

And thank you to all who put in helpful inputs, I was just worried because I used to own a Mustang which only needed 87...

I tried talking to the previous owner but he's a bit daft in remembering what exactly was "changed". I have no problem running 93. Before buying the car I knew that's one of the commitments you should make. Given, even if i don't put 93 in a stock GTO and put 89, it would probably run fine as DD and not as a track car or whatever. However, does anyone know how STRICT the requirement becomes when a car is dyno tuned? I know it depends a lot on the tune...but if I were to put 91...would it cause pinging/knocking/bogging/detonation??

Also, the previous owner said that after tuning the goat, he managed to get 22 city and 29 highway mpg. That's a pretty big jump from what the car is known to give... I haven't gotten a chance to fully test it, but, is this possible or was he just exaggerating? (he told me this after i had already bought the car and he was the owner not a dealer).

Im going to have to say he was exaggerating... If your really in "city driving with stop lights" there is no way your going to get 22 mpg. All in All our cars do get good gas milage for what they are, if driven properly.
__________________

"Let's see if these bastards can do 90..."

2005 gto MBM M6 1 of 566

Stock~315/317~13.35@104.85~2.09 60'

Go Fast-Vararam|Ported Intake & T.b.|Jba shorties w/gutted cats|Tq.V2 cam 113lsa|Asp udp|LS7 clutch|Lss|S.S. clutch line|X-pipe|4" magnapacks|Dyno tuned|420/393

Show-Sap front fascia & grill's|Klearz markers|06 tails|Jhp V1 lip spoiler|18X8.5 ADR's

Best E.T.
1/8 mile~7.74@92.13
1/4 mile~11.99@115.46~1.82 60'on Nitto Dr's~D.A. 250ft.
Best 60ft. 1.78
Curb weight ~ 3620lbs.
  Reply With Quote Quick reply to this message
Old 12-26-2012, 09:19 AM   #23
jasen
Insert Witty Title Here
 
jasen's Avatar
 
Monaro CV8

Join Date: Mar 2010
Location: The 'Ville Oklahoma
Posts: 3,517


Online
Quote:
Originally Posted by xtaspeed05...View Post
Im going to have to say he was exaggerating... If your really in "city driving with stop lights" there is no way your going to get 22 mpg. All in All our cars do get good gas milage for what they are, if driven properly.

Amen to that one. The 29 on the highway I "might" be able to see if it was a fairly downhill commute. Mine has seen 27-28 on the highway before the heads and cam were added. When I lived in Vegas it was cemented at 12-13mpg with all the long ass stop lights there.
__________________
06 IBM M6 Monaro CV8Z
Slightly modified - 452+rwhp/409+rwtq

2010 Honda Civic GX - CNG DD. Got tints yo!

2011 Range Rover Sport Supercharged 5.0

Call Late. Call Often:
John Paul Bishop
11222 Kinsale Ct
Ellicott City, MD 21042-6132

(410) 997-0186
  Reply With Quote Quick reply to this message
Old 12-26-2012, 10:52 AM   #24
xtaspeed05
Abracadabra Holmes
 
xtaspeed05's Avatar
 
2005 GTO Owner

Join Date: Aug 2008
Location: San Jose, CA
Posts: 4,650
Premium Member


Online
Ya, Im with ya there... Even if I am light on the throttle, my car never sees better then 12-13 in the city. Even when it was closer to stock form.
  Reply With Quote Quick reply to this message
Old 12-29-2012, 10:01 AM   #25
BlueGoat06
HPT Street Tuner
 
BlueGoat06's Avatar
 
2006 GTO Owner

Join Date: Nov 2005
Location: Rancho Santa Margarita,CA
Posts: 3,631


Offline
Don't pump 87 if the car wasn't tuned for it, and/or you can't see what the tuner did.
With the proper timing, 91 or 93 should give you the right amount of miles per gallon, plus i'm sure you didn't buy a GTO thinking to hypermile the car did you ?
__________________

2009 Pontiac G8GT
Comp 223/230 .610/.608 112+0 | Rotofab CAI | LS7 MAF |102 mm MAF Housing | 1 3/4 LT's | 2.5" Full Custom Catback |Magnaflow X | Magnaflow Mufflers | Yank SS 3200 stall | Deep Sump 6L80e Pan Kit | B&M 70273 Trans Cooler
HPT Street Tuned



Sold 2006 Pontiac GTO M6
TSP 228R 112 LSA | SW LT Headers O/R pipe | LPE CAI | Magnapack Mufflers | Magnaflow X pipe | RPM Stage 4 T56 | LS7 Clutch | BMR DS Safety Loop | BMR Skid Plate | BMR Air Bags | HPT Street Tuned
  Reply With Quote Quick reply to this message
Old 12-29-2012, 10:29 AM   #26
dreadpirateroberts
anybody seen staypuft?
 
dreadpirateroberts's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 21,394
Premium Member


Offline
when I was stock, 16/25 was the norm.

many times people to embellish the car's capabilities when they are selling to someone they think is uninformed.
  Reply With Quote Quick reply to this message
Old 01-09-2013, 08:38 PM   #27
jkhollywood
06 LS2 Maggie
 
jkhollywood's Avatar
 
2006 GTO Owner

Join Date: May 2009
Location: California
Posts: 65


Offline
had to fill up on 87

I was down to 1/8 of a tank on a trip through Nowhere, NV. The only gas station for many miles was something that had pumps that looked like they were out of the 70's with the nozzle on the side and mechanical roller dials on the front. All they had was 87 octane. I filled up and figured I would need to take it easy. My LS2 is blown and tuned. I thought it would ping if I stomped on it, but it didn't. I eventually got on it and had it in cruise control at 110 mph for 5 or 10 minutes at a time until I approached the CA border. I filled back up in CA with 91 octane at the first place I could find, but I was down to 1/4 tank. That was about a year ago. No problems then or since.
__________________
[SIGPIC][/SIGPIC]

Last edited by jkhollywood; 01-09-2013 at 08:40 PM. Reason: tried to remove signature picture at bottom, couldn't figure it out
  Reply With Quote Quick reply to this message
Old 01-09-2013, 08:47 PM   #28
Doug-04PBM
Registered User
 
Doug-04PBM's Avatar
 
2004 GTO Owner

Join Date: Feb 2012
Location: Central Illinois
Posts: 1,063


Offline
Just run premium guy.


Sent from my iPhone using AG Free
__________________
C5Z Cam/Bolt ons 436/408 DSX Tuned
2004 PBM/Red SOLD
  Reply With Quote Quick reply to this message
Old 01-09-2013, 08:49 PM   #29
ICANHAZGTO??
Registered User
 
ICANHAZGTO??'s Avatar
 
2006 GTO Owner

Join Date: Jan 2012
Location: Fargo, ND
Posts: 422


Offline
Never understood the kind of people that will buy a 15k car that recommends premium, and will not put premium in it because it's "too expensive". If an extra 4-6 bucks a fill up is too much for you, maybe you shouldn't have spent 15k on the car.

Same goes for HDTV. Some people throw down 2k on a 60" plasma, and then refuse to pay for an HD package from the cable company cuz an extra 10 bucks a month is too expensive for them. Really?! Some people are just absolutely retarded.
  Reply With Quote Quick reply to this message
Old 01-09-2013, 09:00 PM   #30
Geoff17
Registered User
 
2005 GTO Owner

Join Date: Jul 2011
Location: Fort Myers, FL
Posts: 259


Offline
Put the premium in, can't believe no one else has brought this up yet, but how do knock sensors work?? Think about it the knock sensor only pulls timing AFTER it has already detected knock, so the knock sensors will pull timing but not until it has already been detonating due to you putting in 87 when your tuned on 93 octane timing tables. So the answer is YES use 93 octane always and if you forget and put 87 in then drive it nicely until it runs out and re-fill with the right stuff.
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the LS1GTO.com Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 12:15 PM.




Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2003-2008, LS1GTO.com
Site Banner Design 2005-2007, Cylosoft

LS1GTO.com is not affiliated with General Motors Corp.