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05-19-2009, 12:43 AM
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#4 |
  
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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Nope, it won't. I try to run premium (Chevron) at least once a month for cleaning purposes. Never noticed any changes in performance. Simple fact is that if your car can't appreciate the added octane, it won't do anything with it.
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