Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-09-2016, 12:07 AM   #1 (permalink)
Master EcoModder
 
Join Date: Feb 2014
Location: Missoula, MT
Posts: 2,498

Dark Egg - '12 VW Touraeg
Thanks: 254
Thanked 1,096 Times in 746 Posts
Why some different cars get identical EPA ratings

I was reading about EPA testing and saw this report.

EPA Issues New Guidelines For Automaker Fuel-Economy Testing

"Agency officials had also previously discussed closing a loophole that allows manufacturers to assign the same fuel-economy ratings to vehicles in the same weight class with identical powertrains--as Ford initially did with the C-Max Hybrid and Fusion Hybrid. This negates any effect of differing drag coefficients on the fuel economy of those vehicles, but according to the story, the EPA may back away from this proposal."

I always wondered why this

gets identical ratings as this


It's because Ford just gets to not compete with itself. I wonder though which one is the real rated car, the better or the worse?

  Reply With Quote
The Following 2 Users Say Thank You to Hersbird For This Useful Post:
Daox (12-09-2016), MetroMPG (12-09-2016)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-09-2016, 06:25 AM   #2 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,316

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

MPGiata - '90 Mazda Miata
90 day: 52.07 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: 3,846
Thanked 6,723 Times in 3,486 Posts
Years ago (2008) I wondered the same thing about VW:

http://ecomodder.com/forum/showthrea...agon-5887.html



Quote:
So why then would the presumably heavier as well as less aerodynamic 2009 Jetta Sportwagen with its likely higher Cd and (slightly) more frontal area (standard roof rails) have an identical fuel consumption rating as the Jetta sedan equipped with the same drivetrain?


Quote:
I find it difficult to believe that the actual fuel consumption isn't at least 2.4% different (2.4%=1 mpg from the 41 mpg hwy rating for the TDI M-6) between these two vehicles.

Yet the cars' ratings are identical for every powertrain variation.

I don't buy it.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



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
Old 12-09-2016, 09:44 AM   #3 (permalink)
Volvo-driving MachYeen
 
Fingie's Avatar
 
Join Date: Jan 2015
Location: Finland
Posts: 788

Neo Volvo - '98 Volvo S70 10V
90 day: 24.98 mpg (US)
Thanks: 298
Thanked 82 Times in 68 Posts
How many years did it take for officials to notice this? lol
__________________
If you don't make any mistakes in your life,
life itself will be a f*ckup.



With Volvo to Valhalla and back!
  Reply With Quote
Old 12-09-2016, 09:54 AM   #4 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,177

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,476
Thanked 2,542 Times in 1,534 Posts
I've wondered this for quite some time. Why can those cars have the same rating when even the same car's EPA rating differs from year to year?!?! Now I know, thanks!
__________________
Current project: A better alternator delete
  Reply With Quote
Old 12-09-2016, 12:45 PM   #5 (permalink)
Master EcoModder
 
vskid3's Avatar
 
Join Date: Jun 2008
Location: Utah
Posts: 975

Civic DX (sold) - '97 Honda Civic DX
90 day: 34.15 mpg (US)

GTO (sold) - '04 Pontiac GTO
90 day: 22.62 mpg (US)

Green Brick (sold) - '06 Ford Escape Hybrid
90 day: 31.93 mpg (US)
Thanks: 193
Thanked 312 Times in 221 Posts
If they can publish whatever numbers they want, why not just make a super eco trim that uses the same powertrain and give all the others that rating?
__________________


Camry Thread
E-Bike Thread
  Reply With Quote
Old 12-09-2016, 02:41 PM   #6 (permalink)
Rat Racer
 
Fat Charlie's Avatar
 
Join Date: May 2011
Location: Route 16
Posts: 4,150

Al the Third, year four - '13 Honda Fit Base
Team Honda
90 day: 42.9 mpg (US)
Thanks: 1,784
Thanked 1,919 Times in 1,246 Posts
* As tested with optional aero package. Your mileage may vary.
__________________

Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

  Reply With Quote
The Following User Says Thank You to Fat Charlie For This Useful Post:
MetroMPG (12-09-2016)
Old 12-09-2016, 02:56 PM   #7 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,316

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

MPGiata - '90 Mazda Miata
90 day: 52.07 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: 3,846
Thanked 6,723 Times in 3,486 Posts
* Optional Aero Package:

__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



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
The Following 2 Users Say Thank You to MetroMPG For This Useful Post:
Fingie (12-09-2016), vskid3 (12-10-2016)
Old 12-09-2016, 04:19 PM   #8 (permalink)
Volvo-driving MachYeen
 
Fingie's Avatar
 
Join Date: Jan 2015
Location: Finland
Posts: 788

Neo Volvo - '98 Volvo S70 10V
90 day: 24.98 mpg (US)
Thanks: 298
Thanked 82 Times in 68 Posts
Either you buy it or do it better!

__________________
If you don't make any mistakes in your life,
life itself will be a f*ckup.



With Volvo to Valhalla and back!
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com