Thread: Check engine light / wrong gas.
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Old Apr 13, 2005 | 05:54 PM
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fastball
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From: Cleveland, Ohio - Rock 'n Roll capitol of the World
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I honestly couldn't tell you if the CEL is a direct result of low grade gas, but rough engine performace certainly is. Our cars have 10:1 compression, and any car running over 9:1 is considered high compression. High compression = 91 or better octane.
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