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      02-02-2014, 06:32 PM   #7
crimson49er
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Drives: Jerez Black '08 E90 M3
Join Date: Jan 2014
Location: San Ramon, CA

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Quote:
Originally Posted by radiantm3 View Post
To be honest there are far better ways to spend your money. You'll probably be faster running your car with 1/4-1/2 a tank of gas (weight reduction) over filling it with with higher octane.
true. you actually want to run the lowest octane you can that doesn't detonate. octane rating is essentially the resistance to burn so running high octane in a car not tuned for it will actually rob you of power because your motor won't be able to fully combust it.
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