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Old 12-31-2015, 12:35 PM   #4 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

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)
Thanks: 2,373
Thanked 2,162 Times in 1,465 Posts
The tires are a suspect. How well inflated do you keep them (measure with a hand-held gauge, not the gas station air pumps)? And what tires did you buy? Were the new tires LRR rated? LRR = "low rolling resistance." Check out the specs on

And I agree 40mpg in that car is pretty good. Is it an auto or manual transmission?
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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