Best Gas Octane Level

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Feb 24, 2009 | 09:49 PM

thepest51

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From: North van BC

Best Gas Octane Level

What is the best octane level gas to use in a stock 2.4L SS

Feb 24, 2009 | 09:52 PM

07BaltSS/SC

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From: Somewhere in WI

Quote:

Originally Posted by thepest51

What is the best octane level gas to use in a stock 2.4L SS

Ive seen alot of guys run 91-93 because thats what it calls for. So between there!

Feb 24, 2009 | 09:54 PM

turbo08ss

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From: n.ridgeville ohio

i only rusn 93 or 94 octane

Feb 24, 2009 | 09:59 PM

riko540

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From: South Jersey

I believe the owners manual recommends 91-93 octane. I personally use 93 octane.

Feb 24, 2009 | 10:02 PM

Jaemon52

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From: Michigan

91 or higher bro

Feb 24, 2009 | 10:03 PM

outtamymind

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From: Calgary, Alberta

i run 91. my bro runs 87 in his. i used to run 87 and then switched to 91 and their is a difference in how the car acts.

Feb 24, 2009 | 10:06 PM

thepest51

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From: North van BC

i run 89 octane plus insted of the reg 87

would i see much diff with 91 or 94

and would runing 89 damage my motor at all or just loss in performance

Feb 24, 2009 | 10:07 PM

07BaltSS/SC

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From: Somewhere in WI

Quote:

Originally Posted by thepest51

i run 89 octane plus insted of the reg 87

would i see much diff with 91 or 94

and would runing 89 damage my motor at all or just loss in performance

It'll run better but your not going to be running no 12sec 1/4 lol but itll be a smoother idle and ride most likely!

Feb 24, 2009 | 10:11 PM

thepest51

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From: North van BC

thx for the info

im just geting started so all stock right now
but still way faster than my 99 cavalier 2.2L LOL

Feb 24, 2009 | 10:14 PM

#10

outtamymind

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From: Calgary, Alberta

Quote:

Originally Posted by 07BaltSS/SC

It'll run better but your not going to be running no 12sec 1/4 lol but itll be a smoother idle and ride most likely!

agreed. the reason they don't recommend 87 is due to the knock that the engine gets from pre-ignition.

Feb 24, 2009 | 10:16 PM

#11

BLAZIN07SS

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From: Miami, Florida

Quote:

Originally Posted by outtamymind

agreed. the reason they don't recommend 87 is due to the knock that the engine gets from pre-ignition.

ding ding ding. we have a WINNAR!

lol

Feb 24, 2009 | 10:17 PM

#12

thepest51

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From: North van BC

but running 89 is not going to harm my motor right?

Feb 24, 2009 | 10:21 PM

#13

Jaemon52

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From: Michigan

It's never good to have constant spark knock.

It talks about this in the user manual I think

Last edited by Jaemon52; Feb 24, 2009 at 10:21 PM. Reason: Automerged Doublepost

Feb 24, 2009 | 10:21 PM

#14

BLAZIN07SS

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From: Miami, Florida

Quote:

Originally Posted by thepest51

but running 89 is not going to harm my motor right?

why do you think OEM doesnt recommend it? pre-ignition over time will harm your motor. along with decreased mileage and decreased engine performance. is it really worth saving 2 or 3 dollars when you fill up?

Feb 24, 2009 | 10:24 PM

#15

IGotABalt

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From: Brighton, Michigan

the LS is fine to use whatever in correct?

Feb 24, 2009 | 10:27 PM

#16

outtamymind

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From: Calgary, Alberta

your LS should take 87, you could use 89. using 91 in your LS would be a waste. and ya i've done my share of research on this matter. and yes it says this all in the owners manual.

Feb 25, 2009 | 11:59 PM

#17

mjruiz123

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From: Chicago

I run 93 in mine and it runs great.

Feb 26, 2009 | 12:21 AM

#18

pat_07ss

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From: Montreal, Canada

you can run both, it was shown that the ECM has 2 tunes, one for 87 and one for 91 or higher

i run 91 for gas mileage and performance, and your valves stay cleaner that way