The reason I said not to use it is because it will be a waste of your money. If you really feel like burning though some extra cash I'm always open to donations to my personal fund.
The higher octane rating from race gas will not help you if your car doesn't need it. If you're not detonating or pinging from high compression or raised boost levels then you don't need it.
Higher octane ratings mean slower, more controlled burns. That's why you might actually run slower with a higher octane fuel then you need. You'll at least be wasting your money.