What octane to use?

97StangGT

Founding Member

Mar 11, 2002

351

0

0

Colora, MD

Sep 26, 2006

#1

• Sep 26, 2006

• #1

I just purchased a '97 Cobra that is stock. It has a few suspension mods and an exhaust, but the motor is stock. I was wondering what octane of gas I should use? Thanks!

 

SVT98Snake

New Member

Apr 15, 2005

258

0

0

OK, USA

Sep 26, 2006

#2

• Sep 26, 2006

• #2

91

 

SVT98Snake

New Member

Apr 15, 2005

258

0

0

OK, USA

Sep 26, 2006

#3

• Sep 26, 2006

• #3

you could probably get away with 87 or 89...just listen for detonation in cool weather or if you get a CAI.

 

97StangGT

Founding Member

Mar 11, 2002

351

0

0

Colora, MD

Sep 26, 2006

#4

• Sep 26, 2006

• #4

Well the dealer filled it up with "premium" before I bought the car. I am not sure what octane they used. It got down to a little less than 3/4 tank and I filled it up with 89 octane. Do you know what the manual recommmends? My car didn't come with one.

 

COBRA90GT

Mustang Master

Sep 22, 2001

6,654

0

87

HOCKEYTOWN ® , MI

Sep 26, 2006

#5

• Sep 26, 2006

• #5

Look at your speedo/cluster - premium fuel only.

 

97StangGT

Founding Member

Mar 11, 2002

351

0

0

Colora, MD

Sep 27, 2006

#6

• Sep 27, 2006

• #6

I know it says to use premium on the speedo cluster, but I was just wondering what octane people were using?

 

9

95StangMan

New Member

Dec 8, 2004

72

0

0

Santa Rosa, CA

Sep 27, 2006

#7

• Sep 27, 2006

• #7

I use 91

 

97StangGT

Founding Member

Mar 11, 2002

351

0

0

Colora, MD

Sep 27, 2006

#8

• Sep 27, 2006

• #8

I filled up with 89 yesterday at $2.39 a gallon. Not too shabby. The car seems to be running well!

 

B

BadTony

New Member

Apr 29, 2005

17

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2

Vancouver

Sep 27, 2006

#9

• Sep 27, 2006

• #9

never heard of premium at 89 octane before

 

brian98gt

Founding Member

Mar 12, 2002

377

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0

new jersey

Sep 27, 2006

#10

• Sep 27, 2006

• #10

the manufacturer calls for 91, i use 93

 

9

97 cobra svt

New Member

Jul 27, 2006

6

0

0

Sep 28, 2006

#11

• Sep 28, 2006

• #11

brian98gt said:

the manufacturer calls for 91, i use 93

Click to expand...

me too

 

97StangGT

Founding Member

Mar 11, 2002

351

0

0

Colora, MD

Sep 28, 2006

#12

• Sep 28, 2006

• #12

I didn't say that 89 was premium, I just said that is what I filled up with. My car didn't come with the original manuals, any idea where I could buy them at besides ebay?

 

SVT98Snake

New Member

Apr 15, 2005

258

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0

OK, USA

Sep 28, 2006

#13

• Sep 28, 2006

• #13

I use 2 gal of 101 blended with the rest of 93.

Ford says they hold 15, I only get 13....which makes my octane 94.230769230769230769230769230769230769230769230769230769230769230769230769230769230769230769