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Old 06-28-2011, 10:52 AM   #92 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,527

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 65.39 mpg (US)
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sayonara "70 at 70"

I have a saying for the Firefly: "70 at 70".

Meaning: I can expect to average about 70 mpg (US) while driving with load and aiming for a target / average speed of 70 km/h (~43 mph) indicated, in decent weather conditions. (That's for the modded car, but with the alternator active.)

Well, I took the UFO to Ottawa last night for the monthly EV meeting... seems like "~100 at 70" is the new "70 at 70". Meaning: 100 mpg (US) is fairly easy to sustain on level ground at 70 km/h.

For the round trip I saw ~90 mpg (US) indicated on the as-yet unverified/uncalibrated onboard fuel consumption display. That's driving with load on the open road (back roads), E-on-C and E-off-C to stops & turns, and a small amount of pulse and glide where appropriate in the ex/urban bits. Target speed was 75 km/h (~47 mph) on the back roads when not being followed. (Posted limit = 80 km/h)

I plan to do a speed vs. mpg graph for the car in stock form (minus hybrid functionality) in the not too distant future. It'll be somewhat tricky because... (a) no cruise control; and (b) the car cycles in and out of lean burn regularly to do NOx purging, which will cause the numbers to vary by some amount on otherwise identical runs. We'll see how messy the plot looks...

I'm definitely looking forward to doing some modding though - "100 at 50" (mph) has a nice mathematical ring to it...
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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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