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Old Sep 14, 2007 | 07:08 AM
  #41  
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Originally Posted by Chemdawg99
The best way to optimze the performance and longevity of your Vette is to follow the Owner's Manual to the letter. Yes, you can run a lower grade of gas in your car. If you want your ride to last AND have the best performance, follow the manual.

No bust on anyone's financial situation because I KNOW I am fortunate to even be financially secure enough to have a Corvette, but if you can't afford to put in 91 octane gas then maybe you can't really afford a Vette.
I own a vette whether you think I sould or not, I run 87 octane gas and have for the majority of 250,000 miles, and do jes fine thank you.
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Old Sep 14, 2007 | 07:12 AM
  #42  
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Originally Posted by Chemdawg99
So true!!!!!!!!!!!!!!!!!!!!
What a buncha ol' fuddy duddys!!!
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Old Sep 14, 2007 | 07:21 AM
  #43  
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Originally Posted by BobbyG
I understand the basic question being asked in this thread but I'll ask; "why"?

We're driving a relatively expensive car that was designed to use premium fuel yet for some reason some want to save a few penny's. To me it makes no sense walking into a show room looking at a $50,000 car and deciding not to my it because it requires premium fuel that costs an additional $0.30 more than regular....
.30x19=$5.70 and @2.49 per gal + 28 mpg on hwy=64 extra miles of driving. or 1 trip to work, the local dew drop inn and back home.
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Old Sep 14, 2007 | 07:54 AM
  #44  
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Originally Posted by Buckskinner
I own a vette whether you think I sould or not, I run 87 octane gas and have for the majority of 250,000 miles, and do jes fine thank you.
Like I said in my post, I am not begrudging anyone, any income level, the opportunity to own a Vette. Its your money, your car. You can put whatever kind of fuel you like in it.

I agree with you that you can run 87 octane gas and the PCM will compensate just fine. Your choice to do that.

I am a Soldier in the United States Army and have been for over 19 years. I make a good living and can very much afford to drive what I drive, but by no stretch of the imagination am I a wealthy guy.

That said, GM recommends 91 or higher octane gas or run the risk of reduced performance or possible engine damage. I think I would rather pay .30 cents more a gallon for premium gas than to buy new engine or a new car because I was trying to save a few cents a gallon. I am surprised that you haven't been knocking like crazy putting 87 gas in a car with a 10.1: 1 compression ratio. Good for you (sincerely)

Do what you like and enjoy. Happy to hear you have no issues running 87 octane. To each his own, but I will not put any thing less than top-tier 91 or 93 gas in my Vette.
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Old Sep 14, 2007 | 08:53 AM
  #45  
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Originally Posted by Chemdawg99
Like I said in my post, I am not begrudging anyone, any income level, the opportunity to own a Vette. Its your money, your car. You can put whatever kind of fuel you like in it.

I agree with you that you can run 87 octane gas and the PCM will compensate just fine. Your choice to do that.

I am a Soldier in the United States Army and have been for over 19 years. I make a good living and can very much afford to drive what I drive, but by no stretch of the imagination am I a wealthy guy.

That said, GM recommends 91 or higher octane gas or run the risk of reduced performance or possible engine damage. I think I would rather pay .30 cents more a gallon for premium gas than to buy new engine or a new car because I was trying to save a few cents a gallon. I am surprised that you haven't been knocking like crazy putting 87 gas in a car with a 10.1: 1 compression ratio. Good for you (sincerely)

Do what you like and enjoy. Happy to hear you have no issues running 87 octane. To each his own, but I will not put any thing less than top-tier 91 or 93 gas in my Vette.
that's what they make knock sensors for. I was a sailor in tha navy for 12 years during vietnam (like that makes a difference) I work at Raytheon producing TOW-ITAS missile systems,for the Army, Marines, and National Guard, and make a darn good living at it.
but I don't try to tell folks that running 105 octane gas will harm their car when I can't prove it,
instead of expounding my own unproven ideas I jes tell folks of my own findings and leave speculation to wall street
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Old Sep 14, 2007 | 10:04 AM
  #46  
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Hey CF Guys/Gals,

Some of you have forgotten the other part of this thread. The OP had also asked about his buddy who wants to race him with a prancing donkey? I think Curtis has figured out the octane issue with your rants. However you all need to advise him regarding the "heritage issue". Curtis, view this thread and understand that "YOUR" Chevrolet Corvette rolled off the same assembly line as the new C-6 and is also related to that beautiful C-1, with the same VIN....try that kind of lineage with a FoMoCo prancing donkey

http://forums.corvetteforum.com/show....php?t=1812602
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Old Sep 14, 2007 | 10:11 AM
  #47  
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only the best for my baby. i have even gotten a gallon of the 100 at the drag strip, talk about expensive$$
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Old Sep 14, 2007 | 10:36 AM
  #48  
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Originally Posted by cfee
Can you really tell a difference in 89 octane (in the gas pedal) or 92 octane? I have a race with my buddy and he drives a 07 Mustang GT (nice car) with a 5 speed trans. I have a 97 C5 auto. No engine MODs on either car, can I bet him?
Can you bet him? Did you mean beat him?

Yes, he has a crumby Rustang, its slow and weaksauce. You have a corvette. And use premium if you race the car. When you beat him, don't post details if you didn't do it at a track. You will go to ban camp that way. I like racing at the track for 2 reasons, A) it is legal, B) it is controlled so there is less room for excuses from the loser.

All I want for christmas is this thread to be closed, oh Mod-A-claus will you make my wish come true?
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Old Sep 14, 2007 | 10:38 AM
  #49  
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Originally Posted by Buckskinner
that's what they make knock sensors for. I was a sailor in tha navy for 12 years during vietnam (like that makes a difference) I work at Raytheon producing TOW-ITAS missile systems,for the Army, Marines, and National Guard, and make a darn good living at it.
but I don't try to tell folks that running 105 octane gas will harm their car when I can't prove it,
instead of expounding my own unproven ideas I jes tell folks of my own findings and leave speculation to wall street
Thank you for what you have done in the Service and for what you are doing for us now in the civilian world. There are a lot of folks like you who make what we do "over here" possible

I hope I did not offend you with my posts, just stating my honest opinion. Totally feeling you on the results you are getting on 87 octane. GM recommends 91 or better and I feel better if I follow that recommendation

As for the other half of the OP question, You'll take the Stank no problem
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Old Sep 14, 2007 | 10:57 AM
  #50  
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Originally Posted by BobbyG
Hmmmmm, lets see,
  • My Z06 cost me a tad over $52,000 when I bought it.
  • The manufacturer calls for the use of premium fuel, 91 octane or above.
  • The difference between regular and premium is $0.30 more per gallon.
  • It costs $5.40 more to fill up from an empty tank.....assuming 18 gallons

Anyone see where I'm going with this?...

Let me see, if I average 25 mpg and drive my Vette a 10,000 miles a year, it would cost me a grand total of $120 to use premium. I don't know whether I can afford $10 a month as it cuts into my beer budget.

Last edited by sxeC7; Sep 14, 2007 at 11:01 AM.
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Old Sep 14, 2007 | 11:07 AM
  #51  
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Originally Posted by JACKAL0PE
Not only can you tell but if you keep putting that cheap crap in your tank, you'll get to experience the fun of replacing your gas gauge. How cool would that be?
Not cool huh! ! !

93 is the only gas I put on my car !
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Old Sep 14, 2007 | 11:10 AM
  #52  
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87 would be OK if all you did was Hwy driving and never going WOT.

I run 93 cause I can.
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Old Sep 14, 2007 | 11:11 AM
  #53  
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Originally Posted by VetteFTW
Can you bet him? Did you mean beat him?

Yes, he has a crumby Rustang, its slow and weaksauce. You have a corvette. And use premium if you race the car. When you beat him, don't post details if you didn't do it at a track. You will go to ban camp that way. I like racing at the track for 2 reasons, A) it is legal, B) it is controlled so there is less room for excuses from the loser.

All I want for christmas is this thread to be closed, oh Mod-A-claus will you make my wish come true?
You truely are Corvette envious.
The 07 5sp stang is not weaksause compared to a 97 C5 auto as far as straight line goes.
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Old Sep 14, 2007 | 11:20 AM
  #54  
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Default Sunoco 94 Octane 4 Me

I used some 93 but 94 makes a HUGE difference with my set-up. I would not use anything under 93 and I would find the cleanest 93 you can find like Shell, Sunoco or BP.
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Old Sep 14, 2007 | 11:34 AM
  #55  
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This seems to be out of control,if the lower octane worked for him then it worked I think. It is a legend and I love my vette but I have to say that I also loved my 67 Mustang Conv. and wish I also still had that. I use the highest octane I can find at normal stations,usually Shell. I used to use Sonoco 94 till they got of it in NJ for some reason. Love this site but I think this guy dosen't deserve what he is getting thrown at him. Just my opinion.
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Old Sep 14, 2007 | 11:43 AM
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I can definately feel the difference with premium vs regular. With regular the car doesnt feel as strong, even with normal driving. Also it does not run as smoothly with regular gas.
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Old Sep 14, 2007 | 01:27 PM
  #57  
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Default difference

Originally Posted by robert123
I can definately feel the difference with premium vs regular. With regular the car doesnt feel as strong, even with normal driving. Also it does not run as smoothly with regular gas.
I think in a previous post I did stated that with the retarded ignition timing you can for sure tell the difference, but as to harm? it won't.

Last edited by Buckskinner; Sep 14, 2007 at 01:28 PM. Reason: correct spelling
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Old Sep 14, 2007 | 01:45 PM
  #58  
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Originally Posted by Halfway
Another example of the C5 being too affordable to kids.....

Is the C5 going to become the new Mustang now? See teenagers driving them around every corner.......

Impossible!!! No way could the kids afford to keep up the repairs on CORVETTE, it remains a gentleman's car of mean$$$$$$$$$$$!

This is in light of my wifes pained face when I told her about the possibility of having cracked polished thin-spoke rims on the 'Vette. She always responds. My MUSTANG didn't always suck up money..........and she's right, it didn't.

John
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Old Sep 14, 2007 | 02:36 PM
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Yeah..we are definitely

Quick story...2 months ago I was finally going to the DYNO on my Friday off. I'd wanted to do it for a while and I was excited about the whole trip. I had to be there early and it was about a 2 hour drive from home. I got up very early and eventhough I had 3/4 of a tank I decided to fill up. I almost had it full when I realized I was putting REGULAR gas in. #&*$#@^%$!!! I finished off with 93 and was cussing myself because I knew it would mess things up. I'd tell Mike when I got there. In the process of getting there and watching them get the car ready and all that I forgot all about the gas. Mike did 2 runs and fixed the way lean condition I had resulting from my Vortex, x-pipe and stingers. Two runs later he calls me over and says, "What are you running for gas in here?". I was like DUH...and explained what had happened. Mike had to give me a conservative tune because of my screw-up and the DYNO numbers were way lower than they should have been. The car runs significantly better now. Many tanks of 93 have been run through it. I'll go back to the DYNO in the spring and have him optimize the tune. But even with that small amount of 89, he was seeing the knock sensor doing its thing and the cars performance was severely hampered.
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Old Sep 14, 2007 | 11:54 PM
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Originally Posted by John G Pircsuk
Yeah..we are definitely

Quick story...2 months ago I was finally going to the DYNO on my Friday off. I'd wanted to do it for a while and I was excited about the whole trip. I had to be there early and it was about a 2 hour drive from home. I got up very early and eventhough I had 3/4 of a tank I decided to fill up. I almost had it full when I realized I was putting REGULAR gas in. #&*$#@^%$!!! I finished off with 93 and was cussing myself because I knew it would mess things up. I'd tell Mike when I got there. In the process of getting there and watching them get the car ready and all that I forgot all about the gas. Mike did 2 runs and fixed the way lean condition I had resulting from my Vortex, x-pipe and stingers. Two runs later he calls me over and says, "What are you running for gas in here?". I was like DUH...and explained what had happened. Mike had to give me a conservative tune because of my screw-up and the DYNO numbers were way lower than they should have been. The car runs significantly better now. Many tanks of 93 have been run through it. I'll go back to the DYNO in the spring and have him optimize the tune. But even with that small amount of 89, he was seeing the knock sensor doing its thing and the cars performance was severely hampered.



This is what happens when you go against GM's recommendation to use 91 or higher gas. The PCM will pull timing if you use lower octane fuel.
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