93 Octaine(tryed searching... no luck)

02davestang · Jul 11, 2005

i was just curious if runing 93 octaine on a stock tune would really be any benifit. i've tried it a few times, but couldn't really tell. also... the times i've run 93 octaine, they were'nt consecutive times... i prolly had maybe a 1/4 tank or less of 87 octaine.

DBMSTNG · Jul 11, 2005

only use higher octane if your car is tuned for it or is knocking.

stangman · Jul 11, 2005

02davestang said:
i was just curious if runing 93 octaine on a stock tune would really be any benifit. i've tried it a few times, but couldn't really tell. also... the times i've run 93 octaine, they were'nt consecutive times... i prolly had maybe a 1/4 tank or less of 87 octaine.

nope, it won't make a difference in performance. unless of course you are are on a long trip & are trying to get the best milage possible. 93 burns slower, so it gives better gas milage

007 · Jul 11, 2005

That doesnt seem right. It ignites later, doesnt burn slower. It doesnt release any more power than 87 so why would the mpg be better?

It wont do anything for performance on a stock car. Save your money.

02davestang · Jul 11, 2005

yeah, thats kinda what i was thinking but wasn't sure. i rarely put it in but was just curious. thanks for the input.

csledd · Jul 11, 2005

the stock engine was set to use regular 87.. so go with that until you get it tuned to use 93.

bdcardinal · Jul 11, 2005

i used 87 when i first got my stang, but it pinged a lot. i put in 89 and it still pinged some, and i put in 91 and the pinging stopped. i probably have a lot of carbon buildup on my pistons, especially after 105k miles.

Red03Mustang · Jul 11, 2005

My car began having trouble starting. I've always used 87. So I ran 3 or 4 tanks of 93 through it with some octane boost and fuel injector cleaner. The startup problem went away.

I'm also having my fuel filter changed just to make sure. After that, I'm going to use 89 from now on. I figure the middle ground is a nice place to be.

Chili · Jul 11, 2005

02davestang said:
i was just curious if runing 93 octaine on a stock tune would really be any benifit. i've tried it a few times, but couldn't really tell. also... the times i've run 93 octaine, they were'nt consecutive times... i prolly had maybe a 1/4 tank or less of 87 octaine.

BTW.. You also may not have retrieved any results because it's spelled octane. Not bashing, just trying to help.

BooWFO · Jul 12, 2005

Gone through the gas thing a few times myself. Here we get that 'reformulated" gas it suxs but I've found if I go with the high grade car runs better and gets better MPG. Now if I am in an area with "regular" fuel I don't see as much of a difference with the different grades. I say try a tankful of each and see which gives you better mileage and performance.

rjstaaf · Jul 12, 2005

The only reason to run a higher octane than recommended is to prevent detonation. Higher octane fuel is more resistant to detonation or pre-ignition where combustions occurs before it is supposed to causing severe stress on engine components.

Unless your owner's manual calls for a higher octante or you have modifications such as advanced timing, higher than stock compression or a power adder, there is absolutely no advantage to running a higher octane than recommended.

Some of you mention adding an octane booster and seeing better performance. That is most likely due to the fuel system cleaners that are usually present in those products.

Higher octane fuel or octane boosters do NOT add power by themselves. They will allow you to do things like advance your timing or bump up the boost on a power adder without causing the detonation that would occur with a lower octane fuel.

96WhiteNight · Jul 12, 2005

rjstaaf said:
The only reason to run a higher octane than recommended is to prevent detonation. Higher octane fuel is more resistant to detonation or pre-ignition where combustions occurs before it is supposed to causing severe stress on engine components.

Unless your owner's manual calls for a higher octante or you have modifications such as advanced timing, higher than stock compression or a power adder, there is absolutely no advantage to running a higher octane than recommended.

Some of you mention adding an octane booster and seeing better performance. That is most likely due to the fuel system cleaners that are usually present in those products.

Higher octane fuel or octane boosters do NOT add power by themselves. They will allow you to do things like advance your timing or bump up the boost on a power adder without causing the detonation that would occur with a lower octane fuel.

+1

mrvax · Jul 12, 2005

DBMSTNG said:
only use higher octane if your car is tuned for it or is knocking.

True. Use the lowest octane you can and not have any knocking/detonation. I use 93 b/c of the headswap and timing advance. For a car that is pretty stock it will not benefit you at all.

sgarlic · Jul 12, 2005

Old rumor I remember hearing growing up was that running 93 octane in an 87 recommended vehicle won't enhance performance (as stated many times above,) but will help to clean out the injectors a little, and will get you better mpg.

Not sure if it's true.. I run 89 all the time anyway.

40th GT · Jul 12, 2005

Meh, use Seafoam for injector cleaning.

VividDreams · Jul 13, 2005

I agreed with rjstaaf. i used to run 87. then i had it dynoed and found it to be detonating. so i ran 93/94 and on a stock car saw a gain of 5 HP and 20 lb-ft of torque. dynos run on the same day within a 1/2 hour of each other

rjstaaf · Jul 13, 2005

VividDreams said:
I agreed with rjstaaf. i used to run 87. then i had it dynoed and found it to be detonating. so i ran 93/94 and on a stock car saw a gain of 5 HP and 20 lb-ft of torque. dynos run on the same day within a 1/2 hour of each other

I know you said you agree with me but, I am confused. Higher octane fuel will NOT add hp. It could be that you had bad gas as you shouldn't be pinging on 87 with a stock motor. I wouldn't attribute that 5hp gain to the 93/94 octane fuel, something else is going on there. Maybe higher concentrations of fuel system cleaner in the higher octane fuel????

stangman · Jul 13, 2005

rjstaaf said:
I know you said you agree with me but, I am confused. Higher octane fuel will NOT add hp. It could be that you had bad gas as you shouldn't be pinging on 87 with a stock motor. I wouldn't attribute that 5hp gain to the 93/94 octane fuel, something else is going on there. Maybe higher concentrations of fuel system cleaner in the higher octane fuel????

unless the car was dyno'd at the exact same operating temps it can't be an accurate comparison

VividDreams · Jul 15, 2005

im not saying the 93 octane is the exact reason for the hp gain. all im saying is it did something, be it let the computer change maps due to having no more detonation or whatever.

and like i said, the pulls were within 15 mins of eachother. not a whole lot could have changed.

93 Octaine(tryed searching... no luck)

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