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Old 01-23-2008, 08:35 AM   #1 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,474

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

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)
Thanks: 3,240
Thanked 6,090 Times in 3,156 Posts mailbag: do the OBD2 Suzukiclone ECU's lower MPG compared to pre-OBD2?

Rec'd this message...

Everyone tells me to stick with 89 to 95 metros because the computers were changed to make them more powerful/less fuel effecient in 96 and above. Can I change the co mputer? if so which one...I know there are several. Thanks
I've heard this before, but I don't buy it.

There's even a similar statement at Wikipedia, which has no citation:

1996 - OBD-II (On-Board Diagnostics, Second generation) is added to Metro models, at a cost of some fuel efficiency.
The engine specs, power wise, are identical across the board except for the XFi. So there goes the "more power" angle.

The biggest difference is that the 95 and up cars were about 200 lbs heavier than the previous models. That alone would lead to approximately 4% lower fuel economy in city driving, according to the EPA's rule of thumb.

Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown

has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
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