08 C6 review
Burning Brakes
Joined: Aug 2000
Posts: 931
Likes: 1
From: 53066 WI
Saw that. Do not know if fact. But, with the relatively small difference between 89 and 93 octane, probably would go with the premium. Back when gas was $1.50/gal it seemed that each step up in octane rating was a dime. That does not seem to have changed.
Melting Slicks
Joined: Sep 2006
Posts: 2,976
Likes: 1
From: Santee California
Read your owners manuel. On the LS2 it required a minimum of 87 octane. The 91/92 octane was recommended. The LS3 is probably the same. You will get less performance with 87 octane. I have come across one guy who runs nothing but regular in his LS2.
Safety Car
Joined: Jul 2006
Posts: 4,647
Likes: 1
From: Objects in your mirror are losing , Long Island, NY
St. Jude Donor '08
My LS2 has never seen anything but 93 octane.
Le Mans Master
Joined: Mar 2007
Posts: 6,666
Likes: 14
From: Mission Viejo CA
I pulled up to the forward pump at a local station the other day and was surprised to see one button labeled 100 octane racing fuel. Maybe I live a sheltered life, or blind, but I've never noticed that option before.
I have never used anything but premium unleaded in my vettes. But I'm tempted to try the 100 octane some day soon.
I have never used anything but premium unleaded in my vettes. But I'm tempted to try the 100 octane some day soon.
Melting Slicks
Joined: Sep 2006
Posts: 2,976
Likes: 1
From: Santee California
I pulled up to the forward pump at a local station the other day and was surprised to see one button labeled 100 octane racing fuel. Maybe I live a sheltered life, or blind, but I've never noticed that option before.
I have never used anything but premium unleaded in my vettes. But I'm tempted to try the 100 octane some day soon.
I have never used anything but premium unleaded in my vettes. But I'm tempted to try the 100 octane some day soon.
Melting Slicks
Joined: Mar 2006
Posts: 2,255
Likes: 3
From: Sugar Hill Georgia
I pulled up to the forward pump at a local station the other day and was surprised to see one button labeled 100 octane racing fuel. Maybe I live a sheltered life, or blind, but I've never noticed that option before.
I have never used anything but premium unleaded in my vettes. But I'm tempted to try the 100 octane some day soon.
I have never used anything but premium unleaded in my vettes. But I'm tempted to try the 100 octane some day soon.
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Le Mans Master
Joined: Mar 2007
Posts: 6,666
Likes: 14
From: Mission Viejo CA
I don't recall the price, but it's the gas station/car wash on the west side of I-5 at the La Paz Rd exit. It's at the corner of La Paz Rd and Cabot Rd. I'll check what type of gas station it is next time I drive by. Maybe there's one down your way in Santee.
According to posts here it does not sound like 100 octane will benefit my ride.
According to posts here it does not sound like 100 octane will benefit my ride.
Last edited by RRVettes; Jul 29, 2007 at 02:09 AM.
Race Director
Joined: May 2001
Posts: 15,323
Likes: 2,077
From: Guelph, Ontario
I cannot possibly imagine that any LSx based engine would run properly on 87 octane. Anyone who has hooked up a scan tool on these engines in the summer will tell you that even with 91-93 octane you're going to see some spark retard in the higher gears. So with 87 octane the computer must be pulled out an incredible amount of timing.
Burning Brakes
Joined: Jul 2005
Posts: 1,174
Likes: 1
From: NOVA VA
Racer
Joined: May 2005
Posts: 316
Likes: 0
From: Cumming, GA
Very true. Just to test that theory I ran 102 octane at the drag track once. Did 10+ passes during the night and there was 0 difference in what I ran on 93 vs. the racing gas.
Safety Car
Joined: Jun 2006
Posts: 4,007
Likes: 1,487
From: Ashland, OH
oh boy.....has anyone everheard you car runs its fastest when its on the verge of detonation? leaner is meaner? used to crake me up back in my 5.0 day back in the 90's when my small block fords would beat up on old men with their big block chevies becuase they were either overcammed for their combination or WAY over carbs and theirs ran like crap. you can run any LSx motor on 87, aluminum heads disappate heat alot and you have knock sensors to reduce timing....i wouldnt run 87 at a dragstrip but i would run anything over 93 either.