Thread: going slower uses more gas. what??
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Old 09-07-2021, 02:59 PM   #13 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
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Black and Green - '98 Honda Civic DX Coupe
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90 day: 66.42 mpg (US)

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Quote:
Originally Posted by Isaac Zachary View Post
That's incorrect. ... The difference is how close or how far from optimal efficiency is the load putting onto your engine and what RPM's are you having to rev it up to to get that kind of power.
Yes, and the BSFC map redpoint posted on 8/12 in this thread is handy here to explain more precisely where those "optimal efficiency" moments or "sweet spots" in the acceleration/power curve are.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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