What octane should I run

f8yd2blk · May 10th, 2006, 03:11 AM

Team, I've owned my car for about 2 weeks now and she's great. What gas should I be feeding her? I've been giving her premium unleaded. Is that overkill?

blue6er99 · May 10th, 2006, 04:02 AM

as long as you don't have detonation problems there is no reason to use the premium unless you have a tune that is optimized for the higher octane, other than than that you are just throwin your money away. good luck.

1slo5.0 · May 10th, 2006, 08:03 AM

Too much octane hurts power output. Internal combustion engines make max power when they are on the verge of detonation. Using more octane than what is needed will cost horsepower, not gain it.

Drgnracin72 · May 10th, 2006, 09:05 AM

i belive the recomended is 89 or 91 i cant remember

mdvaldosta · May 10th, 2006, 09:38 AM

87 is recommended unless you have a Mach1 or Cobra, then it's 91.

lemon · May 10th, 2006, 12:45 PM

so 87 for 2v ( unless high octane tune ), 87-91 for 3v, and 91-93 for 4v.

Aliate X · May 10th, 2006, 08:53 PM

Originally Posted by lemon

so 87 for 2v ( unless high octane tune ), 87-91 for 3v, and 91-93 for 4v.

mach1's are 4v. But basically yes.

Octane rating is resistance to burning, so running high octane is only running gas that is more resistant to detonation, if you dont need it, youre wasting your money.

00SoSlow · May 11th, 2006, 12:35 AM

would it be good to run not regular but the next up in a v6 when i put full exhaust on?

AtlanticBlue99 · May 11th, 2006, 07:55 AM

not if you arent tuned for it. get an xcal 2 tune for all of your mods then have it tuned for whatever octane you want to run. i am tuned for 93 octane

1slo5.0 · May 11th, 2006, 09:36 AM

Originally Posted by 00SoSlow

would it be good to run not regular but the next up in a v6 when i put full exhaust on?

Exhaust has nothing to do with octane requirements. Octane requirements are based strictly on compression ratio, timing and power adders.

May 10th, 2006, 03:11 AM	#1
f8yd2blk Newbie Join Date: Apr 2006 Location: Edwards AFB, California Posts: 10 iTrader: 0 reviews	What octane should I run Team, I've owned my car for about 2 weeks now and she's great. What gas should I be feeding her? I've been giving her premium unleaded. Is that overkill? __________________ Mustangs + Miller Lite+ Hot Chics + Hip Hop +Apple Pie = True American Culture

May 10th, 2006, 08:03 AM	#3
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Too much octane hurts power output. Internal combustion engines make max power when they are on the verge of detonation. Using more octane than what is needed will cost horsepower, not gain it. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

May 10th, 2006, 09:05 AM	#4
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,638 iTrader: 2 reviews	i belive the recomended is 89 or 91 i cant remember __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

May 11th, 2006, 07:55 AM	#9
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,859 Blog Entries: 1 iTrader: 0 reviews	not if you arent tuned for it. get an xcal 2 tune for all of your mods then have it tuned for whatever octane you want to run. i am tuned for 93 octane __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

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May 10th, 2006, 04:02 AM	#2
blue6er99 Regular Join Date: Mar 2006 Location: Mesa, AZ Posts: 52 iTrader: 0 reviews	as long as you don't have detonation problems there is no reason to use the premium unless you have a tune that is optimized for the higher octane, other than than that you are just throwin your money away. good luck.

May 10th, 2006, 09:38 AM	#5
mdvaldosta MM Fanatic 2002 Mustang GT 11.47@120.58 Join Date: Aug 2005 Location: Valdosta, GA Posts: 3,940 iTrader: 0 reviews	87 is recommended unless you have a Mach1 or Cobra, then it's 91.

May 10th, 2006, 12:45 PM	#6
lemon Enthusiast 1999 GT Rag never@ran Join Date: Aug 2005 Location: Charleston, SC Posts: 697 iTrader: 0 reviews	so 87 for 2v ( unless high octane tune ), 87-91 for 3v, and 91-93 for 4v.

May 11th, 2006, 12:35 AM	#8
00SoSlow Hardcore Enthusiast Join Date: Feb 2006 Location: Pewaukee, Wisconsin Posts: 1,340 iTrader: 0 reviews	would it be good to run not regular but the next up in a v6 when i put full exhaust on?

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