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Using Octane Booster in a 2002 TT

Fuel System

Vehicle Information: Year: 2002; Engine (Size, Modifications): 3.6 ltr.; Total Mileage: 4300;

I'm sure the question has been asked before, but as a new member please indulge me. I have a 2002 911 Turbo and the owners manual states in bold print in several places to use 98 octane and if not available use a minimum of 95 octane. The best I can find in northern California is 92 octane. What about octane boosters? Is it worth it? Is it a issue I should worry about? Porsche seems to think so, giving it so much press.

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