Thread: 89 or 91 octane - '91 300CE
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Old 05-13-2010, 09:07 PM
tjts1 tjts1 is offline
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89 octane is usually blended at the pump as its going into your fuel tank using 91 an 87 octane. Since you never really know how well its being proportioned, I stick to 87 or 91.
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