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Old 12-19-2013, 10:07 PM
GCFTW GCFTW is offline
2011 2.0T Base MT, Bathurst Black
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Man its been a while since I have been on here. Long story short, if your tune only advances timing based on 87, you will not see any gain using higher octane.If your tune is based off of higher octane , then 91 you will see an advantage.You might see a slight advantage in the hottest days of the year to run 91.Using 87 octane in really hot weather might trigger Hyundai's conservative knock control and retard timing.
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