What Octane do you use?

87, 91, or 93? I use 87, the cheapest.

93 of course:)

I wouldnt suggest 93 for a stock car unless thats what it calls for. With nitrous you must be a fool to run anything lower than 93 though lol. 93 is all my car will see.

87.

Nothing but premium.
Of course mine is running 11:1 compression.

escort, but 94oct running lots of timing with no knock sensor

set up the car for 91 octane.

87 octane in my '93 LX, 5.0, 5-speed, completely stock set-up.
No pinging ever.
Gets 20 mpg average city/highway combined conditions.

unless you have a tune or F/I it is a waste to put in anything but 87

I used 93 in the GT and Cobra

unless you have a tune or F/I it is a waste to put in anything but 87

unless your engine runs a really high compression ratio

alright if your stock then you dont have to run more then 87

unless your engine runs a really high compression ratio


or your running a LOT of timing...like me. :)

alright if your stock then you dont have to run more then 87

well im not trying to nitpick or anything, but i was saying some cars do have to run more than 87 stock, ive heard of some bmw's having to run higher. but you are right for the most part

well im not trying to nitpick or anything, but i was saying some cars do have to run more than 87 stock, ive heard of some bmw's having to run higher. but you are right for the most part
The mod motor SVTs have to run 93 stock

I am not sure about the Focus, Contour, or 5.0 Cobras and first gen L

ZX2's that have the Ford Racing pcm need 91+, i think the svt focus and contour are the same

94...so goddamn expensive

something perhaps overlooked here: I just run good ol' 87 because all my '93 GT has to do right now is get me from home to work and back to feed the wife and little ones. But for those of you running higher I offer this: wouldn't it be cheaper and yield just as much boost if you bought some octane booster and then filled your tank with 87? I haven't priced a bottle of booster lately but I used to go that route when gas was half the price and I still thought I was saving money.

A good bottle of octane booster isnt going to turn 87 into 93 by any means. Not on a full tank.

Even a good bottle of octane booster isn't actually a good bottle of octane booster.

Stuff is over-rated.

:iagree:

plus if used frequently, over a long period of time, the octane boost can kill your spark plugs, and possible the coil

I use 87 in my 9.5:1 302 with aluminum heads and 12* advance. Hell, since regular spiked up to $3.00+, I put it in the SVO too. Thats right, 8:1 with 10psi on regular unleaded(14 on 91).

Nothing but premium for my Stang. [ few mods ]

I use 91+ but my car is capable of taking regular, and with premium goin up to 4 bucks this summer i might just have to switch over :shakehead

I use 91+ but my car is capable of taking regular, and with premium goin up to 4 bucks this summer i might just have to switch over :shakehead

if it is capable of taking regular then your wasting your money with 91. 87 is more explosive...

The Mach 1 only gets 93