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What octane do you use?

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Old Apr 24, 2016 | 10:25 PM
  #21  
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I used 87 in my C5 when I was mad about the high prices. It ran just fine. I wouldn't hesitate using it in my C7 if I had to, but have only used 91 since I have owned it.
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Old Apr 24, 2016 | 10:34 PM
  #22  
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Always 91. Hard to find anything higher here and feel no need to seek it out.
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Old Apr 24, 2016 | 10:39 PM
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93 here in all 3 of the vette's
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Old Apr 24, 2016 | 10:48 PM
  #24  
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Where do you live to be able to get 93 octane?
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Old Apr 24, 2016 | 10:49 PM
  #25  
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Originally Posted by MikeLsx
93 octane
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Old Apr 24, 2016 | 10:52 PM
  #26  
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Originally Posted by Tvhess
Where do you live to be able to get 93 octane?

It's everywhere in the Houston area, 91 seems harder to find around here.
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Old Apr 24, 2016 | 10:53 PM
  #27  
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91 is about as high as I can get here however I am using 91 Ethanol free
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Old Apr 24, 2016 | 10:57 PM
  #28  
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FYI When i was out in Spring Mountain back in February I asked what they used. All their cars use 91, and all the cars ran real well.
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Old Apr 24, 2016 | 11:15 PM
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Mobil high test - 93
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Old Apr 25, 2016 | 01:00 AM
  #30  
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97 Octaine
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Old Apr 25, 2016 | 01:11 AM
  #31  
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91 is about as high as I can get here in southern New Mexico.
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Old Apr 25, 2016 | 01:14 AM
  #32  
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Originally Posted by dakotagoon
e85
Your resonse is probably meant to be a joke but for those who don't read their Owners Manual, this is what is printed:
Prohibited Fuels
Gasolines containing oxygenates, such as ethers and ethanol, as well as reformulated gasolines are available in some cities. If these gasolines comply with the previously described specification, then they are acceptable to use.
However, E85 and other fuels containing more than 15% ethanol must be used only in FlexFuel vehicles.


The C7 is not a FlexFuel vehicle!
I did find a good place to use e85, when returning a rental car (that was very cost effective when oil prices were higher.) I checked with the rental car agency and was told most all of their cars are e85 comparable.
Unless you grow corn it's probably the only logical use of the product!

Last edited by JerryU; Apr 25, 2016 at 01:23 AM.
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Old Apr 25, 2016 | 02:38 AM
  #33  
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Originally Posted by JerryU
Your resonse is probably meant to be a joke but for those who don't read their Owners Manual, this is what is printed:
Prohibited Fuels
Gasolines containing oxygenates, such as ethers and ethanol, as well as reformulated gasolines are available in some cities. If these gasolines comply with the previously described specification, then they are acceptable to use.
However, E85 and other fuels containing more than 15% ethanol must be used only in FlexFuel vehicles.


The C7 is not a FlexFuel vehicle!
I did find a good place to use e85, when returning a rental car (that was very cost effective when oil prices were higher.) I checked with the rental car agency and was told most all of their cars are e85 comparable.
Unless you grow corn it's probably the only logical use of the product!
If youre tuned for e85, you can run e85. I may run it in my c7 in the future.
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Old Apr 25, 2016 | 09:08 AM
  #34  
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No joke. Tuned for e85 and modded by Vengeance. Over 2,000 miles running 91-93 and or a mix of e85(75%) pushing 758 rwhp.

Originally Posted by JerryU
Your resonse is probably meant to be a joke but for those who don't read their Owners Manual, this is what is printed:
Prohibited Fuels
Gasolines containing oxygenates, such as ethers and ethanol, as well as reformulated gasolines are available in some cities. If these gasolines comply with the previously described specification, then they are acceptable to use.
However, E85 and other fuels containing more than 15% ethanol must be used only in FlexFuel vehicles.


The C7 is not a FlexFuel vehicle!
I did find a good place to use e85, when returning a rental car (that was very cost effective when oil prices were higher.) I checked with the rental car agency and was told most all of their cars are e85 comparable.
Unless you grow corn it's probably the only logical use of the product!
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Old Apr 25, 2016 | 09:12 AM
  #35  
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Shell 93 in NJ.
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Old Apr 25, 2016 | 09:32 AM
  #36  
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93 Octane "Top Tier" fuel only.
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Old Apr 25, 2016 | 09:39 AM
  #37  
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Originally Posted by dakotagoon
e85
Please elaborate. I assume you have done a flex fuel conversion for the track benefits based on where you live. I would hate to see one of our members just give it a try on their stock C7.

Ahhh, I see others reacted before me here. GOOD!

Last edited by felkebg; Apr 25, 2016 at 09:41 AM. Reason: kept reading to see other reactions
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Old Apr 25, 2016 | 10:49 AM
  #38  
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WE have 93 available in this area but it come with that "up to 10% ethanol crap in it. We also have at some stations a 91 available without the crap ethanol. I only use the 91, Same thing when I had my 07 Z06, vehicles run fine!

I also have a boat and a ATV & 10 2 stroke toys and tools and they all get the 91 without the ethanol crap.
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Old Apr 25, 2016 | 11:12 AM
  #39  
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92 or 93 depending on what's available when I need to fill up.
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Old Apr 25, 2016 | 11:17 AM
  #40  
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93..........
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