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Old 03-18-2014, 01:34 PM   #12 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,546

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: 3,309
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Don't forget: the "car guys and girls" who designed your cooling system sized it for a worst case scenario: climbing out of Death Valley, with a full load of passengers & cargo, with the A/C on, and a giant stuffed Barney tied on the roof.

That's why the car guys & girls are now putting active shutters on newer cars. Because it's a big waste to have a gaping open maw on the front of the car all the time. And a variable block still permits "worst case scenario" operation.

If your driving isn't "worst case", you're safe to partially block the grille if you do it progressively and monitor the results.
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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