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Old 09-09-2015, 04:26 PM   #25 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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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: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 55.99 mpg (US)
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The amount of debris -- sand & fine grit -- piled inside the rockers in the areas by the rear drains where it's rustiest would challenge the idea that condensation is the main culprit!

If grit is getting inside, then so is salty water in the winter, which is much worse than pure condensation.

But condensation would absolutely make things worse, especially where rust has already started.

Regardless, spraying rust inhibitor from day one, like you do, is best.
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