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Old 08-25-2008, 10:45 PM   #2 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,807

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

MPGiata - '90 Mazda Miata
90 day: 53.56 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: 61.46 mpg (US)
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Quote:
Originally Posted by mar5ka View Post
Trying to figure out what happened, my mileage was worse with my grill blocked anyone have any idea's
Ideas:

- possibly faulty "test" methodology (what are you comparing it to? Identical speed & route? Identical weather & traffic conditions?)

- blocked too much, so your electric fan was running a lot more (significant electrical load)

- blocked too much, IAT's were elevated enough to cause timing to back down and lost efficiency

Quote:
Also I found if I remove my passanger mirror there is a lot more wind noise
What did you use to cover the hole with? Possibly it had less acoustic insulation than when the mirror was in place. The A pillar vortex can make a lot of noise.

Some people will refer to a mythical Chevy Caprice which supposedly had a better Cd with the mirrors ON, but I'm doubtful that any car wouldn't benefit from a passenger mirror delete.
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