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Old 01-09-2010, 12:18 PM   #78 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,530

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

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
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Quote:
Originally Posted by Fubeca View Post
I'm curious as to whether my mpg difference will be consistent as the weather warms up or if when the weather is warmer I might see something more like 10% increase with the topper.
I think your relative efficiency increase will remain close to 4% regardless of ambient temperature.

Phil can correct me if I'm wrong, but when he said his cold weather aero enhancements didn't really "show up" at the pump until the return of good weather, I believe he was referring to his "previous best" (warm weather) MPG performance, not strictly a before/after comparison in cold conditions.

All else being equal, your absolute MPG will also be higher when the warmer weather returns, but the relative improvement of aerocap vs. open bed should be about the same (at the same testing speed).
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