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Old 07-01-2019, 01:23 PM   #15 (permalink)
Ecky
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Join Date: Dec 2011
Location: New Zealand
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ND Miata - '15 Mazda MX-5 Special Package
90 day: 40.51 mpg (US)
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I tested a few tanks of E0 in my Insight and could not find any discernible difference in economy. I think the math shows it should be around 3%. I might give ethanol-free premium a try with my new engine but I'm not holding my breath.
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