View Single Post
Old 06-02-2014, 10:00 AM   #5 (permalink)
Batman Junior
MetroMPG's Avatar
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,213

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: 70.75 mpg (US)
Thanks: 3,790
Thanked 6,626 Times in 3,437 Posts
In the U.S. EPA test, the manual is handicapped by the test procedure which dictates non-eco shift points and prohibits coasting when decelerating.

As a result, even though a manual may be rated worse than the automatic, in the real world it can return better results with just basic ecodriving techniques.


I ran a brief test of a CVT (rated 40 mpg US combined) against a manual (rated 37 combined) Mitsubishi Mirage, and the manual won out in urban driving.


Similarly, the 2015 Nissan Micra (new to Canada) has nearly identical ratings for the manual and automatic, yet in real world ecodriving, the manual beat the automatic (4 speed slushbox) by 10%:


The only time a higher-rated automatic may make more sense is on the highway if the gearing is so much taller and you do the majority of your driving on the freeway.

Best advice: test both yourself in the same conditions on the same route!
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown

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