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Old 07-11-2008, 05:06 PM   #2 (permalink)
rjacob
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Join Date: Jun 2008
Location: Rochester, NY
Posts: 152

2017 Honda Civic LX - '17 Honda Civic LX
90 day: 39.92 mpg (US)
Thanks: 2
Thanked 38 Times in 4 Posts
They don't sound too promising:
Don't count on E3 spark plugs to save you money on gas - AutoblogGreen
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