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Message: <blockquote data-quote="FineLinePimpin" data-source="post: 5732886" data-attributes="member: 570705">Traction control has ZERO effect on MPG's..if you are seeing a change its purely coincidence. Im guessing you have the non supercharged Saleen, so the 89 octance will be fine unless in very hot weather you get spark knock. 05 and up mustang have the Spanish Oak ecu that can use either low..87-89 octane or higher 91-93 octane and adjust accordingly and actually make a little more power on the higher octane. If your car ISNT tuned for higher octane it will actually get WORSE mpg's on said higher octane because it will burn through it quicker.I would run the 91 octane in the warmer months because of the way the car SHOULD be tuned from Saleen. You could always get a handheld tuner to change that though. Unless its blown the lower octane tune will work fine.</blockquote>

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