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Old 01-24-2008, 11:32 AM   #1 (permalink)
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MetroMPG's Avatar
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,461

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

MPGiata - '90 Mazda Miata
90 day: 55.97 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: 67.41 mpg (US)
Thanks: 4,000
Thanked 6,893 Times in 3,577 Posts mailbag: Metro engine won't stay warm in super cold weather

This isn't the first time I've heard this story about the little 993cc motors in these cars in extremely cold conditions ... (like -20 C / -4 F and below):

It's been real cold lately and driving the Geo is just brutal in this weather. I have a piece of cardboard covering 100% of the front of the radiator yet the engine still dislikes warming up (and even reaching a warm state, the temperature gauge will slide all the way back to the "C" mark if left idling).

I was talking with a guy today and he said that there's probably something wrong with my thermostat as he believes that the coolant in my car shouldn't circulate at all until a certain temperature is met.

Is this true with the Fireflys/Metros?
Feel free to jump in with other diagnoses & suggestions, but here's my reply...

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

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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