Octane question

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Sep 9, 2005 | 05:15 PM

2KSS

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From: BIG State of TEXAS

Octane question

Well here goes... Can you run 89 octane in your LS1 ?? Without any side effects ?

The reason I ask is because the price of premium is getting outragious !! I'm looking to start running unleaded plus (89 octane) in my SS.

Sep 9, 2005 | 05:25 PM

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00T\A

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From: NW Houston,TX

You might be able to squeeze by without any detonation on a stock tune.
I would only use if i had no other option.

Sep 9, 2005 | 05:46 PM

mmiller

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If you have enough discipline to not RPM the heck out of it, which would make it prone to detonation, I think you would probably be OK with 87 octane if you drove it like a grandma.

Sep 10, 2005 | 07:19 AM

2KSS

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Quote:

Originally Posted by 00T\A

I would only use if i had no other option.

With premium at $3/gal or more.... isn't it time to consider other options ??

Well I put some in the car last night... had a little valve clatter when trying to accelerate on the highway from 65 to about 75..... I'll run out the tank and probably go back to premium.

Sep 11, 2005 | 12:25 AM

2KSS

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no one else ???

Sep 11, 2005 | 12:39 AM

BigTexJK

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Avoid the temptation of lower octane gas

I also (foolishly) filled up with a tank of 89 at the local Chevron, and under normal acceleration had valve clatter and it's killing me. Sounds like there's a handful of gravel trying to get out of the cylinders. IMHO the savings of $2-$3 per tank isn't worth risking a $30k car.