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Old 11-12-2011, 07:28 AM   #8 (permalink)
GRU
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Join Date: Oct 2011
Location: Windsor ON Canada
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silver bullet - '00 Honda Civic
90 day: 34.41 mpg (US)
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It could also be tires. If your tires are worn down about 1/4 inch which is 1/2 inch in diameter it will show a ~2% error compaired to a new tire. Another thing is make sure you have stock size tires on if you want the speedo to be accurate
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