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Old 08-28-2003, 05:28 PM
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The M103 engine cannot adjust for lower octane fuel. As for those cars that are supposedly capable of using regular gasolines, they are borderline in many cases. When the temps get well over 100F in Arizona, you can hear a lot of American cars pinging like crazy. If I owned a car supposedly capable of using 87 octane, I'd be using at least 89.
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