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Old 06-16-2008, 09:33 AM   #1 (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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BMW M3: "The optimal speed for fuel economy in this car seems to be around 80mph"

Anybody with an M3 want to bust/confirm this guy's "tip"?

Quote:
Since this seems to be coming up a lot more recently, I thought I'd post it and some fuel efficiency tips.

The optimal speed for fuel economy in this car seems to be around 80mph.


While you have to give him credit for laying out out his testing approach (details are posted in an M3 enthusiasts forum, see link below), the absense of 50 & 60 mph speeds seems to me to be a gaping hole in the data.

I'm pretty skeptical of the conclusion.

Forum thread: http://www.m3forum.net/m3forum/showthread.php?t=216328

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FYI, as a point of comparison, I tested the fuel economy of a 505 hp Corvette, and its best economy landed pretty much where I expected it would: (meaning, nowhere near 80 mph)

http://ecomodder.com/forum/showthrea...05-a-9841.html

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