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Old 06-13-2018, 01:51 PM   #6 (permalink)
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Join Date: Nov 2013
Location: Apple Valley
Posts: 2,084

Winsight - '00 Honda Insight
90 day: 56.69 mpg (US)

Miaderp - '95 Mazda Miata
90 day: 28.53 mpg (US)
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Well of course you are getting better mpg now, your valvetrain was probably worn, now it's basically a brand new head with way less leakdown. Also, I'm going to assume you had the head shaved to make it flat again? If so, that's also a small compression bump. Not much, but everything counts I guess.

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