View Single Post
Old 02-17-2008, 08:03 PM   #2 (permalink)
Batman Junior
MetroMPG's Avatar
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,125

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

MPGiata - '90 Mazda Miata
90 day: 53.56 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)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 64.03 mpg (US)
Thanks: 3,758
Thanked 6,570 Times in 3,406 Posts
The main reason the mileage went down in '95 and up is because the body style changed, and the cars got significantly heavier.

I doubt there's any difference between the '94 ECU and the '95 ECU. In '96 the cars got OBDII, that's where the biggest difference would be seen.

Here's my advice:

Keep the '99 ECU specifically because it will permit you to use a ScanGauge in the vehicle (the SG requires an OBD2 computer). Using a ScanGauge to fine tune your brain and right foot will reduce your fuel consumption dramatically more than any ECU swap you could possibly make!
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods 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
  Reply With Quote