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Old 03-25-2010, 10:28 PM   #4 (permalink)
Allch Chcar
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Join Date: Jan 2008
Location: North Coast, California
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Cordelia - '15 Mazda Mazda3 i Sport
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No.

It's a matter of volume. 16 ounces of octane booster isn't going to make an appreciable difference to a 15 gallon tank of 87 Octane. You need more than a gallon of 100 octane to make any difference in that much fuel.
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