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Old 01-20-2020, 08:11 PM   #22 (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: 39.72 mpg (US)

Oxygen Blue - '00 Honda Insight
90 day: 58.53 mpg (US)
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Be aware that you will need to run a full tank through it to calibrate it, possibly two. I think I had mine within 1% after my second calibration. But until then it can at least show relative savings. For instance, you might let it idle and toggle the hydrogen system on and off and observe the measured gallons per hour, to see exactly how much difference there is in gasoline usage.
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