Which Octane?

bostonbands · December 2nd, 2006, 08:50 PM

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!

HMUSN · December 2nd, 2006, 08:53 PM

91 will be fine.
shit i ran 87 in my old stang and it ran fine.
just don't use the 93 tune.

bostonbands · December 2nd, 2006, 08:55 PM

thanks. so if I did use the 93 tune, I'd need to use 93 octane always...but i'd get more power?

HMUSN · December 2nd, 2006, 08:56 PM

not really.

the higher octane just burns cleaner.

T.M.-808- · December 2nd, 2006, 11:05 PM

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.

December 2nd, 2006, 08:50 PM	#1
bostonbands Regular Join Date: Nov 2006 Posts: 69 iTrader: 0 reviews	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! __________________ 2010 Kona Blue/silver GT500 Convertable

December 2nd, 2006, 08:53 PM	#2
HMUSN Doc 1986 SVO Join Date: Nov 2006 Posts: 36,836 iTrader: 9 reviews	91 will be fine. shit i ran 87 in my old stang and it ran fine. just don't use the 93 tune. __________________

December 2nd, 2006, 08:55 PM	#3
bostonbands Regular Join Date: Nov 2006 Posts: 69 iTrader: 0 reviews	thanks. so if I did use the 93 tune, I'd need to use 93 octane always...but i'd get more power? __________________ 2010 Kona Blue/silver GT500 Convertable

December 2nd, 2006, 08:56 PM	#4
HMUSN Doc 1986 SVO Join Date: Nov 2006 Posts: 36,836 iTrader: 9 reviews	not really. the higher octane just burns cleaner. __________________

December 2nd, 2006, 11:05 PM	#5
T.M.-808- Regular Join Date: Aug 2006 Location: HAWAII Posts: 143 iTrader: 0 reviews	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. __________________ ..........05 GT... 2 1/2" DROP..........

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