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gasoline octane requirements
91 octane is required.My son works for this particular dealership and says they routinely use
89 octane.Looking at various car magasines I see that a 10:1 compression ratio calls for premium fuel.My car has a 9.8:1 ratio.If I see no noticeable performance difference will I harm the engine over time using 89 octane.I don't drive in the mountains,tow anything,or drive over 70 mph.