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Discussing Which Octane? in the 2005+ Forum. might be a dumb question but I can't (easily) find an answer on google. ...

       

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Old December 2nd, 2006, 08:50 PM   #1
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Which Octane?


might be a dumb question but I can't (easily) find an answer on google. Which gas grade to use?

I had a 93 Gt and recall when using low grade gas I could feel the power loss and hear the gas "popping" so I just started using 93

is 91 just as good? I have the diablo tuner on it's way and have seen "tune for 91, tune for 93" but don't see details. more power with the 93 tune?

I don't usually care about gas prices but also don't want to waste on 93 if 91 is going to be the same for my GT

thanks all!
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- Pro5.0 Short Shifter
 

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Old December 2nd, 2006, 08:53 PM   #2
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91 will be fine.
shit i ran 87 in my old stang and it ran fine.
just don't use the 93 tune.
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Old December 2nd, 2006, 08:55 PM   #3
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thanks. so if I did use the 93 tune, I'd need to use 93 octane always...but i'd get more power?
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'06 GT Vert
- Sport Scoop Hood (cervini?)
- SLP Loudmouth Exhaust
- Stripe Kit (Red)
- Push-start ignition
- WMS High Velocity Intake System
- Diablo Tuner
- Pro5.0 Short Shifter
 
Old December 2nd, 2006, 08:56 PM   #4
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not really.

the higher octane just burns cleaner.
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Old December 2nd, 2006, 11:05 PM   #5
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The 05+ stangs are tuned for 89 octane.It's not like the GM OBD-2 PCM that adjusts the timing per grade octane your using.
When folks put a cold (i like to say fresh) air intake,they usually require a tune from a handheld tuner,this will also download a 93 octane tune,this really wakes up the car.
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