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Old 04-26-2012, 06:09 PM   #1
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08 GT slow

So i threw a little 89 in my car and a couple days later the pedal felt less firm and there was a huge impact on low and mid range, what gives??
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Old 04-26-2012, 06:39 PM   #2
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Originally Posted by MikesChargedGT
So i threw a little 89 in my car and a couple days later the pedal felt less firm and there was a huge impact on low and mid range, what gives??
Maybe just bad gas, I always put in shell or bp 93
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Old 04-26-2012, 06:52 PM   #3
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Originally Posted by MikesChargedGT
So i threw a little 89 in my car and a couple days later the pedal felt less firm and there was a huge impact on low and mid range, what gives??
Do you have a tune on the car? Probably bad gas though..
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Old 04-27-2012, 10:25 AM   #4
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I put half a tank of 91 instead of 87 on the stock tune out of curiosity

---------- Post added at 03:25 PM ---------- Previous post was at 03:24 PM ----------

91 from chevron instead of the off brand 87
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Old 04-27-2012, 10:47 AM   #5
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Quote:
Originally Posted by MikesChargedGT
I put half a tank of 91 instead of 87 on the stock tune out of curiosity

---------- Post added at 03:25 PM ---------- Previous post was at 03:24 PM ----------

91 from chevron instead of the off brand 87
That shouldn't be an issue.. Unless you mixed it, that could cause it to "feel" like a lose of power... Still not a big issue or harmful if you did..

I would just caulk it up to bad gas..
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Old 04-27-2012, 11:13 AM   #6
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Re: 08 GT slow

Take her out and beat it out of her......that will teach her.
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Old 04-27-2012, 11:38 AM   #7
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Take her out and beat it out of her......that will teach her.
Lol!
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Old 04-27-2012, 12:30 PM   #8
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Re: 08 GT slow

I took her out today and drove her like a pissed off teenager and now shes back to normal!
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Old 04-27-2012, 08:10 PM   #9
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I took her out today and drove her like a pissed off teenager and now shes back to normal!
That always helps and is fun as hell
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Old 04-28-2012, 09:18 PM   #10
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Re: 08 GT slow

Probably bad gas. A non tuned S197 has ZERO TO GAIN from anything higher than 87. It won't hurt anything but it isn't adding any secret HP.
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Old 04-29-2012, 06:41 AM   #11
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I was just curious because some cars adjust to higher octane
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Old 04-29-2012, 08:04 AM   #12
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Re: 08 GT slow

They do adjust with timing advance or what not but usually it simply that, adjusting. Our cars DO adjust, just you won't see or feel anything of value.
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Old 04-29-2012, 09:59 AM   #13
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They do adjust with timing advance or what not but usually it simply that, adjusting. Our cars DO adjust, just you won't see or feel anything of value.
Perhaps better gas mileage
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Old 04-29-2012, 06:40 PM   #14
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Perhaps better gas mileage
I saw a good increase in MPG
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Old 04-29-2012, 09:37 PM   #15
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I saw a good increase in MPG
The increase in MPG makes up for the extra cost it pretty much evens out, if not a slight "cost saving" edge towards 91 octane
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