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Old 03-16-2018, 02:24 PM   #12 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,811

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Actually, I want to correct my last post a little. The Fit auto's freeway RPMs, in top gear are 23% LOWER than a Fit manual would be. Your RPMs will also be significantly lower than the Fit manual in 4th gear (I did not calculate how much but maybe near 20% lower). Basically, the final drive gear is significantly shorter on the auto, but most of the auto's higher gears seem so much taller than on the manual that they way over-compensate. Highway cruising RPMs in your Fit should be significantly LOWER than a 2001-2005 Civic HX manual (like maybe 8% without accounting for wheel/tire size).

You could certainly work harder using a Fit manual trans and get better FE (check out the "PaleFit" on this site), but your auto is serving you pretty well.

Get the taller 195/65-16 wheel/tire combo I mentioned and your actual cruising RPMs on the freeway might match the legendary Civic VX fuel sipper.

I think I got it right this time.
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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