Which gas should I use? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

TornadoSS · 03-14-2011, 08:02 PM

Quote:

Originally Posted by BAWLZ SS

so let me get this straight!... gas with ethanol is not as good or what's the issue??? i live in CA and i pump 91 octane. do i need like an octane booster?? will the car run better if i add octane booster to my gas??

Theres not enough room here to go into details on ethanol.....I would not use any gas with more than 10% blended ethanol, the Camaro is not designed to run on it. Besides the power loss from ethanol it is also corrosive to the fuel system. If you are driving a stock Camaro with little mods, 91 octane is fine. I run an ECM tune from Jannetty Racing that is specifically for 91 octane and the mods I have. You do not need an octane booster and it most likely would not run any better even if you added it. Hope that helps.

BAWLZ SS · 03-14-2011, 08:11 PM

Quote:

Originally Posted by TornadoSS

Theres not enough room here to go into details on ethanol.....I would not use any gas with more than 10% blended ethanol, the Camaro is not designed to run on it. Besides the power loss from ethanol it is also corrosive to the fuel system. If you are driving a stock Camaro with little mods, 91 octane is fine. I run an ECM tune from Jannetty Racing that is specifically for 91 octane and the mods I have. You do not need an octane booster and it most likely would not run any better even if you added it. Hope that helps.

thanks for the info!

Scruffage · 03-15-2011, 08:45 AM

While all this is good information it still doesn't directly answer my question.

Options available to me.

1. 93 octane 10% ethanol blend

2. 91 octane NO ethanol

Which option is best? One or Two?

CC Performance · 03-15-2011, 11:33 AM

Either or is fine. The 10% isnt hurting anything. The car wants to run at 14.7, if you were custom tuning you would make stoic 14.3 (with 10%)... It isnt going to matter. Use either or and your fine. Maybe the 91 (without) will be more consistent and is a better choice. We get 91 with 10% my car is at 11.3 on the compression and I dont have any issue with knock retard.

whats this tells you ... and I said this in the thread earlier is that you at 10.7'ish compression is going to be just fine.. I am running more compression than you with crappier gas and dont have issue.

Scruffage · 03-15-2011, 12:01 PM

Quote:

Originally Posted by CC Performance

Either or is fine. The 10% isnt hurting anything. The car wants to run at 14.7, if you were custom tuning you would make stoic 14.3 (with 10%)... It isnt going to matter. Use either or and your fine. Maybe the 91 (without) will be more consistent and is a better choice. We get 91 with 10% my car is at 11.3 on the compression and I dont have any issue with knock retard.

whats this tells you ... and I said this in the thread earlier is that you at 10.7'ish compression is going to be just fine.. I am running more compression than you with crappier gas and dont have issue.

Great,Thanks!

Sack Rat 2SS · 03-15-2011, 05:59 PM

Well I crossed ALL the way over to Ethanol. It is available to me four miles from where I live. My mileage went from close to 18 to 13.5 MPG. The stoio is 9.7 for ethanol so I had to upgrade my fuel delivery system and upgrade the injectors plus a tune from ADM to put it all together. Never any soot in my tailpipes as I am running on pure fuel injector cleaner. Ha Ha

All the cars that can only run pump 91 octane with 10% ethanol should have the tune optimized for it.
Scruffage, I vote you run 91 with 10 % ethanol as it is much more available, unless the pure 91 is as easy to find.

Scruffage · 03-15-2011, 06:59 PM

Quote:

Originally Posted by Sack Rat 2SS

Well I crossed ALL the way over to Ethanol. It is available to me four miles from where I live. My mileage went from close to 18 to 13.5 MPG. The stoio is 9.7 for ethanol so I had to upgrade my fuel delivery system and upgrade the injectors plus a tune from ADM to put it all together. Never any soot in my tailpipes as I am running on pure fuel injector cleaner. Ha Ha

All the cars that can only run pump 91 octane with 10% ethanol should have the tune optimized for it.
Scruffage, I vote you run 91 with 10 % ethanol as it is much more available, unless the pure 91 is as easy to find.

I have a location close to me that has 91 ethanol free, at least for now. I filled up Sat and drove about 450 miles, mostly interstate and averaged 23.7 mpg

03-15-2011, 05:59 PM	#20
Sack Rat 2SS Drives: Silver SS/RS, Man 6 Join Date: Apr 2009 Location: DFW area, Texas Posts: 884	Well I crossed ALL the way over to Ethanol. It is available to me four miles from where I live. My mileage went from close to 18 to 13.5 MPG. The stoio is 9.7 for ethanol so I had to upgrade my fuel delivery system and upgrade the injectors plus a tune from ADM to put it all together. Never any soot in my tailpipes as I am running on pure fuel injector cleaner. Ha Ha All the cars that can only run pump 91 octane with 10% ethanol should have the tune optimized for it. Scruffage, I vote you run 91 with 10 % ethanol as it is much more available, unless the pure 91 is as easy to find. __________________ Silver 2SS/RS Man/6 CTS-V front 6-Piston Calipers, GM 3.91 Rear Gears

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03-15-2011, 08:45 AM	#17
Scruffage Drives: 2011 2ss Rs LS3 manual in black Join Date: Jul 2010 Location: KY Posts: 402	While all this is good information it still doesn't directly answer my question. Options available to me. 1. 93 octane 10% ethanol blend 2. 91 octane NO ethanol Which option is best? One or Two?

03-15-2011, 11:33 AM	#18
CC Performance Account Suspended Drives: 99 Camaro SS, 79 z28, 70 GTX Join Date: Oct 2009 Location: ST Helens, OR Posts: 1,759	Either or is fine. The 10% isnt hurting anything. The car wants to run at 14.7, if you were custom tuning you would make stoic 14.3 (with 10%)... It isnt going to matter. Use either or and your fine. Maybe the 91 (without) will be more consistent and is a better choice. We get 91 with 10% my car is at 11.3 on the compression and I dont have any issue with knock retard. whats this tells you ... and I said this in the thread earlier is that you at 10.7'ish compression is going to be just fine.. I am running more compression than you with crappier gas and dont have issue.