The unofficial resource center for Mustang owners and enthusiasts
Ford Mustang Forums - Ford Mustang Classifieds - MustangForums.com Photo Galleries - MustangForums.com Chat Room - Create an Account - Mustang News


Go Back   MustangForums.com > Ford Mustang Tech > 4.6 (Modular) Mustang
Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
Thread Tools Search this Thread
Old 07-17-2005, 06:54 PM   #1
Dan04COBRA
Super Moderator
 
Join Date: Jul 2003
Location:
Posts: 14,852
Send a message via AIM to Dan04COBRA
Default What octane gas do I need to use for my 96-04 GT/Mach 1/Cobra

What octane gas do I need to use for my 96-04 GT/Mach 1/Cobra


For a stock 96-04 GT you need to run only 87 octance. Using any higher octane gasoline will add nothing for performance.

If you advance your timing, upgrade your computer chip, install a tune via Dyno or handheld tuner you will need to look into using 91/93 octance (whatever is available in your area).

Please contribute any information you have, such as why not using higher octane in your application when it's not needed, what it can harm and what it's only needed for.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________

Black 04 Cobra For Sale. Click Below
http://mustangforums.com/forum/musta...216-black.html
Dan04COBRA is offline   Reply With Quote
Old 07-17-2005, 11:31 PM   #2
sk8erdudex
2nd Gear Member
 
Join Date: Feb 2005
Location: SLC, Utah
Posts: 410
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

http://auto.howstuffworks.com/question90.htm
__________________

97 Mustang GT BBK CAI, BBK H-Pipe straight piped catback, Cold Fusion Wet Kit 100 shot, Motive 4.10's
Stage 2 Dual Friction clutch
sk8erdudex is offline   Reply With Quote
Old 07-18-2005, 08:21 PM   #3
andy98gt
3rd Gear Member
 
Join Date: Apr 2005
Location:
Posts: 776
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

PI swapped guys like me w/ there 96-98 GT's gotta use 93 !!
__________________
Slow 98 GT


andy98gt is offline   Reply With Quote
Old 07-18-2005, 08:28 PM   #4
JD1969
Pro. B.S. caller outer
 
JD1969's Avatar
 
Join Date: May 2004
Vehicle: 4000 - 0 -.5 Yes, thats right. I tied half a race.
Location: IL
Posts: 9,407
Send a message via AIM to JD1969
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

Higher octane won't hurt your motor or cause any weird buildup. It will not help you any if you don't need it though. Me I run 93 in my Camaro due to the compression being 10.25:1, but in my 94 GT I run 87.
__________________
GET IN THE RING!
RIP tripsevn7
4/1/77 - 7/27/08
Quote:
Originally Posted by Sidewayz6.0 View Post
I'd **** OPRAH!!!!!!!!
JD1969 is offline   Reply With Quote
Old 07-19-2005, 05:34 AM   #5
blownstanger
2nd Gear Member
 
Join Date: Jul 2005
Location:
Posts: 359
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

Whats a PI sawp and how can I do it to my 98 GT?...thanx guys
__________________

98 Saleen Rep., ATI Procharger 10psi w/3-core I/C
42lb Inj.-Ford GT Fuel Pump, 3.73's, Accufab TB and Upper Intake Plen., Cust. Exhaust, FRPP Shorties
Lightning MA
blownstanger is offline   Reply With Quote
Old 07-23-2005, 10:38 PM   #6
04 GT Interceptor
 
Join Date: Jul 2005
Location:
Posts: 23
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

It may sound strange, but my 04 GT seems to "guzzle" higher octane, so I just run 87.
04 GT Interceptor is offline   Reply With Quote
Old 07-24-2005, 11:13 PM   #7
Jakes
2nd Gear Member
 
Join Date: May 2004
Location:
Posts: 150
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

msg deleted by author----
__________________
Jakes....
'02GT, Vert - KB Blower - FIPK Tube w/KB CAI - 70mm TB - MRT mid-pipe w/cats - Magnaflow cat-back - FRPP "G" springs - KYB struts/shocks - MM caster/camber plates
Jakes is offline   Reply With Quote
Old 07-25-2005, 12:37 AM   #8
Guest
 
Posts: n/a
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

As per what my signature was for like a month or two...

Only use Premium if you have;
1. advanced timing
2. increased compression ratio (the general cut off from regular to premium is around 9.8-10:1 depending on the car and driving conditions)
3. forced induction of any sort ie nitrous, SC, Turbo

I'm going to add a fourth option here though.
4. If you feel your car pinging or knocking, try bumping up to 91 octane, if it goes away then you DO in fact NEED to use premium gas.
  Reply With Quote
Old 07-27-2005, 03:05 AM   #9
justingt
3rd Gear Member
 
Join Date: May 2005
Location: Smithfield. RI
Posts: 810
Send a message via AIM to justingt
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?

why do u need to use premium for a PI swap or a tune?
__________________
2001 GT - C&L 80 mm maf/ CAI kit, magnapacks, bullit pedals, pony floor mats, mustang letter inserts, mach 1 chin spoiler, mach 1 grill delete, 17x8 bullit wheels, SCT 93 Octane tune, 75 mm TB/Plenum, billet peices, white face gauges...ran 14.071!
justingt is offline   Reply With Quote
Old 07-27-2005, 03:08 AM   #10
justingt
3rd Gear Member
 
Join Date: May 2005
Location: Smithfield. RI
Posts: 810
Send a message via AIM to justingt
Default RE: TECH: What octane gas do I need to use for my 96-04 GT?


Quote:
ORIGINAL: blownstanger

Whats a PI sawp and how can I do it to my 98 GT?...thanx guys
PI stands for polished/ported intake...basically it's sandblasting your head for [sm=bling.gif] and porting the intake and exhaust valves to make em bigger allowing more air to be exchanged through your engine...porting if you have the tools you can DIY but leave the sandblasting to the pros
__________________
2001 GT - C&L 80 mm maf/ CAI kit, magnapacks, bullit pedals, pony floor mats, mustang letter inserts, mach 1 chin spoiler, mach 1 grill delete, 17x8 bullit wheels, SCT 93 Octane tune, 75 mm TB/Plenum, billet peices, white face gauges...ran 14.071!
justingt is offline   Reply With Quote



Reply



Tags
1998, 87, 96, cobra, ford, gas, gt, highest, mach, mustang, octane, pi, premium, run, swap

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump

Advertising

Featured Sponsors
New Sponsors
All times are GMT -5. The time now is 03:49 PM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.2.0

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company