octane?

greg donovan · Post by **greg donovan** » Wed Dec 01, 2004 11:37 pm

well i am new to the turbo scene.

what octane can i run?

around here i can get 90 91 and 92. but no 93.

the car will see stock boost levels untill net summer at the soonest. even then it probably wont go over 10psi untill i add a intercooler.

oh, its a '94SS.

vrg3 · Post by **vrg3** » Thu Dec 02, 2004 12:24 am

I think Subaru specifies a minimum of 91 octane. At stock boost levels 91 will be fine. You might notice a little improvement with 92.

greg donovan · Post by **greg donovan** » Thu Dec 02, 2004 6:20 am

sounds good to me.

BAC5.2 · Post by **BAC5.2** » Thu Dec 02, 2004 6:58 am

The higher the better.

I'd run C16 if it was cheap enough, and could be pumped directly into a car.

Oh, and if it didn't kill your engine...

dzx · Post by **dzx** » Thu Dec 02, 2004 4:08 pm

If you get too high of an octane, it will actually hurt performance depending on how stock the engine is. 91-93 octane should be fine tho.

91White-T · Post by **91White-T** » Thu Dec 02, 2004 5:15 pm

91 is MORE than enough for stock boost. Besides, even if its shitty gas, the computer will pull timing to reduce any knock, which there will be none anyway.

Brat4by4 · Post by **Brat4by4** » Thu Dec 02, 2004 7:35 pm

Run the highest you can get. It's cheap insurance. The extra cash per fillup is minimal and will be less than $100 per year. Our ECU's are very good about squeezing extra power out of good gas, I'd rather the car keep advancing the timing to make extra power rather than backing it off to save 60 pennies on a fillup. Plus, typically the higher grade is just better gas.

LegacyT · Post by **LegacyT** » Fri Dec 03, 2004 1:56 pm

I've noticed even regular is more then enough for non agressive driving. And even when u give it a little spurt of power there is no sign off detonation.

Mark,

Subaru_Nation555 · Post by **Subaru_Nation555** » Fri Dec 03, 2004 2:33 pm

I always use 93 octane. Its a little pricey but worth it.

legacy92ej22t · Post by **legacy92ej22t** » Fri Dec 03, 2004 3:15 pm

I run Ultra 94 almost exclusively. The only time I don't is if I'm out of town and can't find a Sunoco or I'm at the track running GT-116 !

BAC5.2 · Post by **BAC5.2** » Fri Dec 03, 2004 6:08 pm

When I hit the Dyno, i'll run race fuel. There is a place that sells it down the street from me. Maybe I should get a few gallons when I need to fill up next...

snowboarded · Post by **snowboarded** » Fri Dec 03, 2004 7:06 pm

I use at least 91, because thats just the highest that most stations i find have.
Anytime i find the higher octanes I get them without question.

Post by **Legacy777** » Fri Dec 03, 2004 8:10 pm

The required octane needed will depend on elevation....even though it's less of an issue for turbo cars. 91 is fine.

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octane?

octane?