What octane do you run in your cobra?

dec322 · Feb 27, 2008

I'm thinking about buying a new edge cobra and am wondering what to expect to run as far as gas goes. I'm coming off a foxbody that would run on anything so I don't know what to expect.

Do you guy run 93 or 89 or the cheap stuff 87(I like the last one)?

Uncle Meat · Feb 27, 2008

Run the minimum octane necessary to prevent knock. If the car is designed to run on 87 octance then that's what you need to put in it. Putting in a higher octane than recommended or necessary will not make any difference at all as far as power is concerned and may even hurt performance.

U.M.

dec322 · Feb 27, 2008

Uncle Meat said:
Run the minimum octane necessary to prevent knock. If the car is designed to run on 87 octance then that's what you need to put in it. Putting in a higher octane than recommended or necessary will not make any difference at all as far as power is concerned and may even hurt performance.

U.M.

That is what I've always heard. I didn't know if Ford recommends a specific octane in the cobras (specifically 99 and 01).

blackfang · Feb 27, 2008

All 96+ Cobras require 91 Octane.

I run 93(being thats what my tune requires as timing is bumped)

94CobraPace · Feb 27, 2008

I run 89 at times in the 01, not all the time, mixes with 93. Usually run 89 when just driving and not going to get on it. No detonation. 93 is recomended by Ford.

Uncle Meat · Feb 27, 2008

Personally I run 93.5, but that's because I'm pushin' 15psi and 22 degrees timing.

U.M.

blackfang · Feb 28, 2008

94CobraPace said:
I run 89 at times in the 01, not all the time, mixes with 93. Usually run 89 when just driving and not going to get on it. No detonation. 93 is recomended by Ford.

Actually 91+ is recommended. Premium fuel only.

Uncle Meat · Feb 28, 2008

I know Ford recommends 91 octane for the Cobra's, but don't the pre-03/04 Cobra's have knock sensors to retard timing in case there's detonation?

Bottom line is to use the recommended octane rating set by the manufacturer for your model car UNLESS its been modified.

U.M.

stang dreamer · Feb 28, 2008

99 octane, premium UK fuel. darent put anything else in it, as our standard 95 octane is crap

SVT32VDOHC · Feb 28, 2008

I just run 93 premium. I did befoe the blower and after. Been running great.

Uncle Meat · Feb 28, 2008

stang dreamer said:
99 octane, premium UK fuel. darent put anything else in it, as our standard 95 octane is crap

You guys must have a different method for determining octane ratings? Here in the U.S. we use the R+M/2 method. I'll bet in the U.K. they use only the R (RON) rating which is higher than M (MON). In the U.S. we add the two ratings together and then devide by two to get the overall octane rating.

U.M.

stang dreamer · Feb 28, 2008

yeah i think its RON that we actually use. still, 95 is crap

mzbhavn · Mar 6, 2008

stang dreamer said:
yeah i think its RON that we actually use. still, 95 is crap

How much is that in Newton-Meters?

stang dreamer · Mar 7, 2008

who knows... a million? could be more.

LaserSVT · Mar 7, 2008

93 with the ocasional can of octane booster

Uncle Meat · Mar 7, 2008

LaserSVT said:
93 with the ocasional can of octane booster

Octane booster is WORTHLESS! Stop wasting your money.

U.M.

LaserSVT · Mar 7, 2008

Uncle Meat said:
Octane booster is WORTHLESS! Stop wasting your money.

U.M.

Friend of mine was doing a promotional thing for NOS brand octane booster and gave me a case for free so I figured id give it a go Car idles a little smoother and dosent pop when reved so it seems to be doing something.

Uncle Meat · Mar 7, 2008

Which NOS product was it? The Street Formula? One bottle of NOS Street Formula added to a 16-gallon tank of 93 octane brings the total rating up to 93.3. Not really that much of a gain when you think about it.

U.M.

LaserSVT · Mar 7, 2008

Yup, street formula. Ive never bought octane booster before but for free I figured why not. I dont see any mpg increase or any SOTP performance increase, just when the car is at 600rpm idle its smoother and when its not in gear and I rev it it doesnt pop anymore when the rpms are going back down. Couldnt justify $10 extra per tank so when im out im out. I would like to get a barrel of Sunco and mix it with the pump gas and see what happens but that will be after I get my KB twin screw.

blueblazes · Apr 4, 2008

I never run less than 93 because psi doesnt like low octane heh.

but like others have stated always run minimum octane required nothing more will help you in anyway

What octane do you run in your cobra?

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