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Old 08-25-2009, 12:23 AM   #10 (permalink)
nahtanoj
EcoModding Lurker
 
Join Date: Jul 2009
Location: san diego
Posts: 11

civic - '08 honda civic lx
90 day: 34.92 mpg (US)
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i just used 89 octane with 10% ethanol (it was cheaper than pure 87). i got 36mpg, same as the last 2 tanks of 87 with no ethanol. same driving conditions. not much to go on, but i didn't see any increase.
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