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Old 09-14-2019, 07:08 AM   #8 (permalink)
Ecky
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Join Date: Dec 2011
Location: Vermont
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Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 21.19 mpg (US)

K-sight - '00 Honda K-sight
90 day: 38.53 mpg (US)
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Engineering Explained has a video which explores some of the evidence behind the Italian tune-up. I believe his conclusion was (if I remember correctly) that the numbers don't really support it working, but I'd have to watch it again.

https://youtu.be/5C9Ie4BcYew
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