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Old 08-13-2017, 01:27 PM   #5 (permalink)
Ecky
Master EcoModder
 
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Join Date: Dec 2011
Location: New Zealand
Posts: 5,117

ND Miata - '15 Mazda MX-5 Special Package
90 day: 39.72 mpg (US)

Oxygen Blue - '00 Honda Insight
90 day: 59.95 mpg (US)
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If you're leaving it in gear, you can probably expect no, or even a negative effect.
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