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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-03-2011, 05:30 PM   #1 (permalink)
Polymorphic Modder
 
SoobieOut's Avatar
 
Join Date: Aug 2010
Location: Utah
Posts: 307

2006 DaCivic Hybrid - '06 Honda Civic Hybrid
90 day: 45.16 mpg (US)
Thanks: 188
Thanked 39 Times in 24 Posts
Hyundai may be inflating MPG figures - UPDATE: busted by EPA

Here's a good article on the discrepency between posted MPG figures and real life results from owners of the Elantra.

Quote:
Consumer Watchdog said it has asked the EPA to investigate Hyundai’s high-mileage claims because, “The Elantra has attracted an unusual number of consumer complaints about real-world mpg averaging in the mid-20s, far from Hyundai’s stated average of 33,” it said.
UPDATE: Hyundai Responds to Consumer Watchdog's Elantra Fuel Economy Complaints - WOT on Motor Trend


Last edited by MetroMPG; 12-06-2011 at 05:17 PM.. Reason: (added quote)
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-03-2011, 06:17 PM   #2 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
...GM needs to do the same thing (damage control) about the MPG differences for the automatic Cruzes between EPA and real-world customers!

...the "manual" tranny Cruze owners seem to beat their EPA numbers easily, while the "automatic" Cruze owners seldom even meet their EPA numbers.

Last edited by gone-ot; 12-03-2011 at 11:01 PM..
  Reply With Quote
Old 12-03-2011, 07:07 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Nov 2011
Location: Santa Barbara
Posts: 13
Thanks: 0
Thanked 4 Times in 2 Posts
Here is a recent analysis that I performed based on comparing EPA numbers to fuelly.com numbers for cars rated at about 40 mpg.



Hyundai way underperforms their EPA numbers; Honda seems to outperform.
  Reply With Quote
The Following 2 Users Say Thank You to Gone For This Useful Post:
MetroMPG (12-06-2011), redpoint5 (02-07-2012)
Old 12-04-2011, 09:54 AM   #4 (permalink)
Master EcoModder
 
Join Date: Nov 2010
Location: Atlanta
Posts: 403

Sweetie - '11 Hyundai Sonata GLS
90 day: 39.35 mpg (US)

My Miles - '03 Combo GLS/KLX/Ninja
90 day: 40.49 mpg (US)

Sipper' - '04 Kawasaki Ninja 250
90 day: 74.98 mpg (US)
Thanks: 1
Thanked 37 Times in 28 Posts
I beat EPA (in 11' Sonata) before learning to drive more efficient.
EPA
City-24
Highway-35
Combined-28

First ten tanks averaged 31.2 or so, and the last ten is around 37.

Have not had a combined tank under 35 in a long time now, and I probably can do better.
__________________
This ain't a war, anymore than a war between men and maggots. Or, dragons and wolves. Or, men riding dragons, throwing wolves at maggots!
  Reply With Quote
Old 12-04-2011, 10:10 AM   #5 (permalink)
GRU
Master EcoModder
 
GRU's Avatar
 
Join Date: Oct 2011
Location: Windsor ON Canada
Posts: 373

silver bullet - '00 Honda Civic
90 day: 34.41 mpg (US)
Thanks: 21
Thanked 36 Times in 31 Posts
Quote:
Originally Posted by BHarvey View Post
I beat EPA (in 11' Sonata) before learning to drive more efficient.
EPA
City-24
Highway-35
Combined-28

First ten tanks averaged 31.2 or so, and the last ten is around 37.

Have not had a combined tank under 35 in a long time now, and I probably can do better.
Do you do EOC or just coast with engine on and drive smarter? Beucase their test would have to be done as a average driver would drive.
__________________

  Reply With Quote
Old 12-04-2011, 10:38 AM   #6 (permalink)
Gen II Prianista
 
Rokeby's Avatar
 
Join Date: Jul 2009
Location: Ballamer, Merlin
Posts: 453
Thanks: 201
Thanked 145 Times in 89 Posts
I can't see the EPA being involved in some kind of conspiracy here.

However, I can see how a vehicle manufacturer could design a vehicle's
propulsion equipment/algorithms such that the vehicle achieves overly
optimistic, read not easily reproducible in the real world, MPGs on the EPA
test cycle.

I think that most folks either don't know or forget that the MPG numbers
coming out of the EPA testing are intended for direct comparison purposes.

The EPA numbers are an estimate based on an arbitrary test cycle. They are
not a guarantee of anything meaningful. Given the infinite different driving
conditions and driver capabilities/commitment, the EPA estimate does not
necessarily predict any particular driver's MPGs. With a large enough random
sample, drivers of vehicles with a 30 MPG EPA estimate will most likely see
greater MPGs than drivers of vehicles with a 20 MPG estimate.

If the EPA estimate is taken as an average estimate, half the drivers of a
particular car will exceed it, and the other half wont.

Which half would you expect to self-select to raise a ruckus?
  Reply With Quote
The Following 4 Users Say Thank You to Rokeby For This Useful Post:
Frank Lee (12-04-2011), HyperMileQC (12-27-2011), NachtRitter (12-06-2011), SoobieOut (12-04-2011)
Old 12-04-2011, 11:11 AM   #7 (permalink)
Master EcoModder
 
Join Date: Nov 2010
Location: Atlanta
Posts: 403

Sweetie - '11 Hyundai Sonata GLS
90 day: 39.35 mpg (US)

My Miles - '03 Combo GLS/KLX/Ninja
90 day: 40.49 mpg (US)

Sipper' - '04 Kawasaki Ninja 250
90 day: 74.98 mpg (US)
Thanks: 1
Thanked 37 Times in 28 Posts
E-on-C and drive smarter, but the car could do much better with some simple reprogramming based on what the UG tells me. 2 small changes would probably net 3-4 mpg better.
__________________
This ain't a war, anymore than a war between men and maggots. Or, dragons and wolves. Or, men riding dragons, throwing wolves at maggots!
  Reply With Quote
Old 12-04-2011, 11:40 AM   #8 (permalink)
EcoModding Lurker
 
Join Date: Nov 2011
Location: Santa Barbara
Posts: 13
Thanks: 0
Thanked 4 Times in 2 Posts
Quote:
Originally Posted by Rokeby View Post
... I think that most folks either don't know or forget that the MPG numbers coming out of the EPA testing are intended for direct comparison purposes.
...
But they are not comparable! If Honda, say, under reports MPGs and Hyundai, say, ultra-tunes their engine to achieve higher EPA MPGs then the comparison is between apples and oranges. People expect to use EPA numbers to compare cars but if automakers are gaming the EPA numbers, then there is no basis for comparison.

If you are interested in MPGs then the only relevant comparison is from real-world MPG numbers. Those numbers are hard to come by; but less so with websites 'crowd sourcing' MPG numbers.
  Reply With Quote
Old 12-04-2011, 02:08 PM   #9 (permalink)
Master EcoModder
 
Join Date: Oct 2011
Location: Los Angeles
Posts: 588

Ladogaboy - '11 Mitsubishi Lancer EVO GSR
Team Emperor
90 day: 27.64 mpg (US)

E85 EVO - '11 Mitsubishi Lancer EVO GSR
90 day: 21.38 mpg (US)
Thanks: 59
Thanked 59 Times in 47 Posts
Of the cars that are listed, the Hyundais do tend to be a bit "sportier," and I wouldn't be surprised if some of those low mileage numbers are caused by the owners' driving habits.
__________________
  Reply With Quote
Old 12-04-2011, 02:09 PM   #10 (permalink)
Banned
 
Join Date: Feb 2008
Location: california
Posts: 1,329
Thanks: 24
Thanked 160 Times in 106 Posts
Self reported BS. All this tells us is which driver's are the biggest liars. I'll take the EPA test numbers over a bunch of self reporting nitwits any day.

  Reply With Quote
The Following User Says Thank You to tjts1 For This Useful Post:
Frank Lee (12-04-2011)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com