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Old 01-10-2008, 09:15 PM   #8 (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: 53.78 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: 66.29 mpg (US)
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I just did some quick calcs, based on driving 15,000 miles per year:

BEFORE: without the cap, at your original "combined" mileage of 16 mpg
  • 937.5 gallons = how much gas used to cover that distance
  • $2812.50 = cost @ $3.00 / gal.
AFTER: with the aero cap and your improved combined mileage of 17.7 mpg ...
  • 847.5 gallons of fuel burned
  • $2542.37 = total cost @ $3 / gal.
That's a savings of 90 gallons, or $270

If all the driving is all highway based, going from 18 to 22 mpg the savings become 151.5 gal., and almost $455!

Talk about a good ROI. You'd think truck owners would go for that.

Amory Lovins would sure approve.
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