91 octane gas
9/5/11, 07:49 AM
#4
Swamp Donkey Man Cans
Join Date: August 20, 2007
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If anything running a higher octane gas in a car that does not require it will hinder fuel mileage and offer no performance gain.
The higher the octane rating the harder the ignition system has to work to ignite the a/f mixture in the cylinder. If you had a tune advancing the timing or higher compression heads/pistons then running a higher octane fuel would be necessary. In a stock car your are best to run what is recommended.
The higher the octane rating the harder the ignition system has to work to ignite the a/f mixture in the cylinder. If you had a tune advancing the timing or higher compression heads/pistons then running a higher octane fuel would be necessary. In a stock car your are best to run what is recommended.
Last edited by 07S197; 9/5/11 at 10:55 AM.
9/5/11, 08:03 PM
#6
Cobra Member
Just run 87 if you don't have a tune. I would highly recommend getting a tuner though, really wakes up the car. AM is a great place to pick up a SCT tuner since they have free lifetime tunes.
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