09-30-2005, 10:54 PM
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Yes there is. Regular is usually 87 octane, then 89, then premium which is from 91-93 usually. Octane is real, and there is a big difference.
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1998 Onyx Black Z/28 408 cubic inches of nitrous injected LS1... Owner/Administator of THE Premier LS1 racing site: LS1 Racer.com My Cardomain ET1(SS/DV) US Navy 
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10-01-2005, 12:07 AM
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Octane is an important factor in high compression engines. Higher octane is less susceptible to predetonation due to compression than low octane is. Ambient temperature is another factor. Cold weather will allow you to get away with a lower octane.
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94 Z28 M6 "Those who expect to reap the blessings of freedom must, like men, undergo the fatigue of supporting it." Thomas Paine
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10-01-2005, 12:09 AM
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I dunno....My car runs better w/93 so I'm sticking with it.
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10-01-2005, 01:16 AM
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Alot of guys claim that 93 is the only way to go. I disagree, I run 89 and can barely tell the difference to the 93. I'm an LT1 guy, I think the LS1 is different buisness. They seem to be more finicky about fuel.
This is just my opinion, I think I'm in the minority here. Everyone here seems to swear by premium fuel.
__________________
Can I hear a shout out for the TA's?
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10-01-2005, 01:32 AM
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LS1's ar not happy with less then 91, you will get redused milage and poor performance. Just not worth saving the maybe 1 dollar at fill up.
__________________
My Rides   Mods:Corsa Premium series Catback, Ported throttle Body, Slp cold air pack, MSD wires, NGK tr55's, HPP3, TCS 3200 Stall/ 2.7 STR, Spohn lca's and panhard bar To be installed:Kooks longtubes with catted Y, 3.73's, transgo shift kit and other tranny toys. To be painted: VFN Sunoco hood, 96-97 SS spoiler and stripes to boot.
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10-01-2005, 01:21 PM
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gas and oil are the two things I would not cheap out on. There are the bassis for your motors life
__________________
My Rides Mods:Corsa Premium series Catback, Ported throttle Body, Slp cold air pack, MSD wires, NGK tr55's, HPP3, TCS 3200 Stall/ 2.7 STR, Spohn lca's and panhard bar To be installed:Kooks longtubes with catted Y, 3.73's, transgo shift kit and other tranny toys. To be painted: VFN Sunoco hood, 96-97 SS spoiler and stripes to boot.
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10-03-2005, 11:17 AM
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i usually run sunoco 94. mine will ping at 91 and lower. shell's 93, it still pings. so i try to use sunoco as much as possible (even tho its $3.45/gal). dont know much about sheetz/exon or mobile. anyone have insite on those?
00z/6m/stock
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10-03-2005, 06:12 PM
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hmm..wouldnt it ruin something if you use 93 octane!? i wanna use it. i have been using regular lately..and doesnt 93 octane give u worse gas mileage than regular or plus?
__________________
 2002 Camaro Z28 35th Anniversary. Blue Metallic. 17,900 Miles (Sold) :'( 1997 6spd Toyota Supra Boost Logic T67 single turbo, 1000cc fuel injectors, AEM EMS, TEIN Flex coilovers, Titan sways
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10-03-2005, 06:15 PM
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Quote:
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10-03-2005, 06:41 PM
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Quite the opposite, running 87 or 89 my car gets horrible gas milage, where as it is much better with 93
__________________
My Rides Mods:Corsa Premium series Catback, Ported throttle Body, Slp cold air pack, MSD wires, NGK tr55's, HPP3, TCS 3200 Stall/ 2.7 STR, Spohn lca's and panhard bar To be installed:Kooks longtubes with catted Y, 3.73's, transgo shift kit and other tranny toys. To be painted: VFN Sunoco hood, 96-97 SS spoiler and stripes to boot.
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10-03-2005, 06:58 PM
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You should actually use the least amount of octane you car can get away with. It will make more power that way.
Octane is a measure of how volitile or unstable the fuel is. If you have a hot tune.. or a car that is specifically setup on premium you'll be hurting performance.
__________________
Alvin@pcmforless.com www.pcmforless.com Proven performance for your 85-05 GM and most Ford. Unmatched experience AND customer service Z28.com Special All V6 dyno tunes in Charlotte NC $125 + dyno time
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10-03-2005, 08:39 PM
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Quote:
__________________
Can I hear a shout out for the TA's?
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