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Octane boosting products

Fuel System

Vehicle Information: Year: 2002; Body Type: Coupe; Total Mileage: 6,200;

With the anemic 91 octane rating we have available [in California] it causes me to wonder what performance improvements, if any, could be derived from using an octane boost product. Is there one on the market that Porsche endorses? Is there one you know of that PCA members have used that works and DOESN't cause damage to the fuel system components?

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