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What octane should I use???

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Old

Aug 9, 2002 | 02:12 PM

#1

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Joined: Jun 2002

Posts: 144

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From: Colorado

What octane should I use???

I'm currently running 91, as that's about the highest around, driving an 87 Firebird Formula (TPI 305). Is it ok to use 87, or do these beasts really want 91?

Thanks!

Old

Aug 9, 2002 | 02:19 PM

#2

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Joined: Jul 2002

Posts: 583

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From: under the hood

I'd say 87 is fine. If you hear any pinging, then move up to 89. But I never heard of them requiring 91.

Old

Aug 9, 2002 | 02:25 PM

#3

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Joined: Jan 2001

Posts: 7,164

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From: Someone owes me 10,000 posts

Car: 99 Formula

Engine: LS1

Transmission: T56

Axle/Gears: 342

Quote:

Originally posted by Odyssey
I'd say 87 is fine. If you hear any pinging, then move up to 89. But I never heard of them requiring 91.

Yeah. You only need higher octane on higher compression motors.

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