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      09-20-2012, 06:17 PM   #12
lbjgh
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Drives: 2013 AW X3 M-Sport
Join Date: Dec 2011
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Higher octane just means the fuel is less susceptible to predetonation.

Just like epiphone3 said some of the highest octane fuels contain ethanol to prevent predetonation.

I use the lowest grade fuel on my motorcycle. and aim for 91 octane for the car.
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