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Old 04-18-2017, 03:04 PM   #7 (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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For my Insight, which has a fairly similar (minus one piston) engine, it's 1750-2250rpm at about 75% load, in stoich burn. I don't think there are any BSFC charts for lean burn, but I'm going to speculate that peak efficiency might be at a slightly higher load.
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