View Single Post
Old 08-29-2012, 11:27 AM   #27 (permalink)
MetroMPG
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,294

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: 58.53 mpg (US)
Thanks: 3,065
Thanked 5,946 Times in 3,080 Posts
It's interesting to noodle the graph...

But I'm not sure using average speed as a measurement over an entire tank works well as feedback to the driver unless the tank is predominantly highway/rural cruising, and other tanks results are over the same/similar route. (IE - controlling for as many variables as possible.)

EG: if a tank includes a siginificant mix of city/suburban plus highway motoring, how do you interpret the results & use the average speed number to your benefit?

Also: does the measurement of average speed include time stopped? (EG: the ScanGauge average speed calculation is not a "rolling" average, which would be more useful. Its calculation includes time stopped.

Consider too that spread out through the year, weather effects will affect the MPG numbers (cold weather = worse mileage; warm = better). How is that separated from the average speed variable?
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote