GT99GT

So just to get this straight, use 87 or 89, but if i do mods like the exaust, underdrive pulleys, new air induction system, gear blah blah, i should then start to use 91... is that right?</P>


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GT99GT

or should i just use 89 all the damn time and call it a day

S10W

the revving the motor prior to shut down is more of a trick for carbuerators -- don't need to worry with fuel injection

Daytomann

I think what everyone is saying is that if you add a supercharger/nitrousor have a heavily modded motor then use 91 or higher. If you run stock or slightly modded induction with a few bolt ons stay with 87/89. Personally, I'm staying with 87 evenafter I intsalla Cold Air Induction kit and my exhaust and bolt ons.</P>


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After the car is paid off (someday)and we totally do a ground up rebuild onthe motor, add SC, and many other goodies....then I will look at high octane<IMG src=smileys/smiley14.gif border="0"></P><edited><editID>Daytomann</editID><editDate>37992.6679166667</editDate></edited>

mabguru

If you check my mods below. I see no difference between the lowest and highest octane rated fuel. So lately I've just been sticking with the cheepy stuff.

N2OJunkie

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No need for higher octane with those mods.</P>

N2OJunkie

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There is no risk for detonation with any of those mods, so stay with the 87.</P>

BLKSTANG9879

If it's stock. Just run 87. It's fine it won't hurt anything.

GT99GT

So i filled up 87 today instead of 89 which is what i was filling with. For some reason it feels like it has a little less power and when i turn on the car it doesnt turn on as smoothly. You guys think its just in my head?

Jugador1

yes</P>


OCTANE RATING IS ONLY A MEASURE OF HOW EASY TO BURN THE FUEL IS.IT IN NO WAY EFFECTS PERFORMANCE UNLESS YOU ARE EXPERIENCING DETONATION WITH LOWER-GRADE FUELS</P><edited><editID>Jugador</editID><editDate>37993.7807291667</editDate></edited>