93 Octane ; General Recommended
Thread Starter
Racer
Joined: May 2005
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From: Rochester WA
St. Jude Donor '05-'07-'08-'09
93 Octane ; General Recommended
Just curious. Do any of you C6 owners out there run 93 octane?
If so, which gas stations can you get 93 octane at?
I use premium in my hyperteched Silverado, usually at Chevron, but
that octane rating says 92 octane.
????
If so, which gas stations can you get 93 octane at?
I use premium in my hyperteched Silverado, usually at Chevron, but
that octane rating says 92 octane.
????
Melting Slicks
Joined: Feb 2005
Posts: 2,179
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From: Palm Coast, FL
I try to only use 93 octane Amoco(now owned by BP Gas) but if not, I'll use 993 octane Mobil(now owned by Exxon). Never a problem in almost 40 years using their gas in vettes, GTO'S, Firebirds, and other cars of these types.
Team Owner
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From: [Enter Unoffensive Comment Here]
Cruise-In VI Veteran
Cruise-In VII Veteran
St. Jude Donor '06
The C6 computer will retard the engine to prevent knock if 93 is not used. The new ZO6 is not 93 "recommended", it is "required". 
Last edited by lager99; Jun 13, 2005 at 11:04 AM.
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Safety Car
Joined: Jun 2004
Posts: 4,430
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From: Whidbey Island WA
No, it will retard the engine if it detects knock. The car does not take a sample, test it, and then run on the low octane tables because it has determined you didnt put 93 octane in it. I would imagine it is the same with the Z as the base car. If it detects knock you get put on the low timing tables until the next fillup. There are btw a number of states that dont have 93 octane and the Z is being sold in them. Chevy told me that 93 octane would be required for best performance but not required period. Since Jim Hall has looked at a number of cars programming and they were all running on the low octane timing tables despite the fact that they had 93 octane in em the point may be moot anyways.
Drifting
Joined: Sep 2004
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From: S.D. CA
Originally Posted by lager99
The C6 computer will retard the engine to prevent knock if 93 is not used. The new ZO6 is not 93 "recommended", it is "required".
Safety Car
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From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Originally Posted by marinedi92
I wonder if any of the aftermarket octane boost products would help or hurt? Thoughts anyone?
Intermediate
Joined: Jun 2005
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Originally Posted by crabman
No, it will retard the engine if it detects knock. The car does not take a sample, test it, and then run on the low octane tables because it has determined you didnt put 93 octane in it. I would imagine it is the same with the Z as the base car. If it detects knock you get put on the low timing tables until the next fillup. There are btw a number of states that dont have 93 octane and the Z is being sold in them. Chevy told me that 93 octane would be required for best performance but not required period. Since Jim Hall has looked at a number of cars programming and they were all running on the low octane timing tables despite the fact that they had 93 octane in em the point may be moot anyways.
if all the cars jim has looked at are running low octane tables, does that mean we are losing alot of hp and could that be the resean there has been slow 1/4 mile times
Safety Car
Joined: Jun 2004
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From: Whidbey Island WA
Good questions. Your not asking the right person though. I have only such knowledge as I have garned from reading what the smart people have shared. Your unquestionably losing power on the low octane tables since it pulls a lot of timing. I would go over to digital and read up in their C6 tech section. Jim Hall is in cahoots with a tuner and they have been revealing a fair bit of information on what they have learned. I think they are trying to get as much infl out there as they can without giving up the farm on their own projects.
Thread Starter
Racer
Joined: May 2005
Posts: 316
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From: Rochester WA
St. Jude Donor '05-'07-'08-'09
re: calif low octane 91
Well those of you living in Calif. shouldn't feel like the lone ranger, because thanks to Queen Christine are new fake Govenor, all 2009
Cars sold in WAshington have to have the same required smog devices as California. Stupid is is stupid does. First she steals the election, then she steals people's fun/dreams. I think that her ideas are all
Cars sold in WAshington have to have the same required smog devices as California. Stupid is is stupid does. First she steals the election, then she steals people's fun/dreams. I think that her ideas are all
Le Mans Master
Joined: Sep 2000
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From: Orlando Floriduh
Hey guys... remember... here in the US the octane rating advertised is R+M divided by two. One is at cruise and the other is under load. This is the reason there is such a huge difference in various brands. Two brands of the same octane rating can react entirely different. Without knowing the numbers used it is a matter of trial and error in performance cars.
Night Race Blue 427
Joined: Feb 1999
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From: Muncie, Indiana ...... Can I buy an amplifier on time ... I ani't got no money now but I'll pay you before I die
In Indiana any station you go to sells 93 octane. If you can find a Sunnoco they sell 94 octane.
Tech Contributor
Joined: Mar 2003
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Originally Posted by SteveFL
is there a noticeable difference between 93 and 100 octane
