Gas Octane......????

[SlideWayzS13]

Ok so i hear from many different sources that higher octance is good for your car once in a while and cleans it out a little. Just wondering what kinda octane you all run in your cars Turbo/NA. And when its track day what you put in.?

Also different locatons where to get higher than 93 Oct. around Chester County

[sherwood]

i always run 93 oct. i use to be tuned for sunoco 94 but they stopped producing that.

if u want to clean out ur system the lucas fuel system cleaner in a bottle is the best one out imo

[CHAOS]

theres a thread about this

[TROLL]

oh noes... this is not tehOT. i will move it for you, please try harder next time.


and to answer your question... higher octane does not burn cleaner as far as i know, and will not clean out your system. higher octane is less prone to detonation--it only allows your engine to run more aggressively *if it is designed to do so*. otherwise you are just wasting your money on more expensive gas that will never provide any benefit.
basically, use what your manual recommends, or what your car is tuned for, if it is tuned. anything more is excessive.

[Broken5hift]

Originally Posted by TROLL

oh noes... this is not tehOT. i will move it for you, please try harder next time.


and to answer your question... higher octane does not burn cleaner as far as i know, and will not clean out your system. higher octane is less prone to detonation--it only allows your engine to run more aggressively *if it is designed to do so*. otherwise you are just wasting your money on more expensive gas that will never provide any benefit.
basically, use what your manual recommends, or what your car is tuned for, if it is tuned. anything more is excessive.

x2. ive read at least two reports that support the above statement. a gas company can try and produce or market cleaner burning fuel, but the octane grades wont net you any cleaner burn over another. when engines use an aggressive tune or are maxed to their overall efficiency for the setup premium is required to lessen the chance of detonation. people who put premium in their car that only requires regular are just throwing money away

[sisforsurfing]

93 octane all the time, every time. You're stupid to run less than what you're tuned for or what is recommended by the factory. You're also (generally) wasting money if you're using a higher octane fuel than your engine is tuned for, and quite possibly slowing yourself down.

In a year or two I hope to have separate 93 octane and C16 maps, but that's a long ways off.

edit: how did 3 people respond before me? haha, oh well.

[SlideWayzS13]

yea my car is Semi-tuned, but i always have put 93 in, just seeing if a tank or a lil higher octane would do anything for me? Thanks. And sorry for this post I didnt search for it, my bad

[Nick 95 6sp]

mine is turbocharged, so I always use 93oct, 94 when it was available at the pump, and with a decent tune I can run about 18 to 20psi or so = about 500whp or so; and a reasonable generalizatin is that the higher the octane the higher boost you can run which has not much to do with a/f ratio but just the detonation resistance of the fuel. So if I want to run max efficient boost on my turbo, 28psi'ish, I use C16 = about 630whp or so. All pump gasolines I know of have detergents in them to keep lacquer and bad stuff from depositing.

Re near to Chester County for high test ...there are probably others too, but the nearest ones I use are at Rt 202 & Rt 1 the Sunoco station has a "racegas" pump which is GT100 and I think that's about 100oct. Up on Rt 3 West Chester Pike, between where Rt 320 and Rt 476 intersect, you'll find K&G Speed Shop and they have almost every kind of racegas available, or at least a wide range selection, everything from VP105 unleaded 105oct, up to C16 which I think is 116 oct; even more radical if they might have VP Import more stable at high boost over 30psi than C16; of course they have methanol and nitromethane too for you hardcore speed freaks.

[peteyturbo]

Basically the higher the octane fuel that you run, the more time you have in the combustion stroke before it combusts..The extra time it takes for the fuel to ignite is what gives you an added margin of safety from detonating, which usually happens when the fuel combusts too early..It is pretty much a given to run highest pump octane on forced induction and high compression..It has no extra properties that will clean your fuel system or combustion chambers out, in fact if you put it in cars designed for regular it will do the exact oppisite..

[CleanNeon98]

I use 87 in the civic, and used 93 in my DOHC neon...the manual said it was recomended for it to run on 91+ so thats what I did. Ive also heard using too high an octane can bend valves...any truth behind this? If you want to clean the fuel system, get a fuel system cleaner with octane booster. Always worked for me.

[xEJ20x]

Originally Posted by CleanNeon98

Ive also heard using too high an octane can bend valves...any truth behind this?

Well this is the biggest load of crap I've heard this morning.

No. Higher octane gas will not cause bent valves.

[na is best!]

i have a allmotor setup and I run a mix of 93 annd 100 octane..it is what my car was tuned for.. and no it doesnt clean your motor.. i think there is a product called seafoam that cleans it pretty good

[CleanNeon98]

Originally Posted by na is best!

i have a allmotor setup and I run a mix of 93 annd 100 octane..it is what my car was tuned for.. and no it doesnt clean your motor.. i think there is a product called seafoam that cleans it pretty good

Yep, I have a can in my garage..never used it lol.

My dad's frined just came from Ukraine, and he said that most of the cars there run on 95 octane (the lowest octane you can get there), and then it goes to either 98 or 100...I will confirm this with him when I see him in a few hours.

[Wiisass]

Originally Posted by CleanNeon98

Yep, I have a can in my garage..never used it lol.

My dad's frined just came from Ukraine, and he said that most of the cars there run on 95 octane (the lowest octane you can get there), and then it goes to either 98 or 100...I will confirm this with him when I see him in a few hours.

The ratings of gas in other countries differs from the US. They use a different method to calculate the octane value. I think we use MON+RON/2 and they use RON. I don't exactly remember what's the same as what, but their 95 is probably the same as our 87 and so on.

[XxaltezzaxX]

I run the lowest in the protege, and 93 in the mx6. They have 94 by the sonoco by my house but I see no need for it.

[Snoozie]

I always use 93. The manual says to use 91 and up. I've never tried to use anything less. And I thought that Seafoam is only supposed to be used on older cars?