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

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 09-01-2016, 10:14 AM   #1 (permalink)
Batman Junior
MetroMPG's Avatar
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,373

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)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 50.04 mpg (US)
Thanks: 3,916
Thanked 6,768 Times in 3,510 Posts
Fiat 500, Ford Fiesta biggest discrepancy real world MPG vs. official ratings in UK

Just two cars deliver their advertised fuel economy when on the road, with the thousands of other models 30% worse on average in the real world, according to comprehensive new data.
Some cars, such as the Fiat 500 and Ford Fiesta, gave barely half the mileage advertised.
A company called Emissions Analytics published a database of MPG results using onboard equipment to measure mileage over four hours of real-world driving.


A couple of notes:

1. Since this is UK data, the fuel consumption ratings they're taking to task are the famously optimistic (unrealistic, some would argue) Euro ratings. They're significantly more optimistic than current US EPA ratings for the same vehicles.

2. The Fiat 500 is sold in Europe with a 2-cyl engine, which is probably the model in question here.

But the Fiesta is likely the same 1.0L turbo that is available in North America.

Nick Molden, CEO of Emissions Analytics: “Currently the real-world performance of cars is on average 29% worse than the official test.
Oh, and the only 2 cars that matched their ratings in on-road driving? The 4.7L Aston Martin Vantage & 3.7L Nissan 370Z.

Attached Thumbnails
Click image for larger version

Name:	2016-Fiat-500-Official.jpg
Views:	189
Size:	187.1 KB
ID:	20494  
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

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 User Says Thank You to MetroMPG For This Useful Post:
Xist (09-01-2016)
Alt Today
Popular topics

Other popular topics in this forum...

Old 09-01-2016, 10:38 AM   #2 (permalink)
Master Novice
elhigh's Avatar
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,311

Josie - '87 Toyota Pickup
90 day: 27.96 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 50.13 mpg (US)
Thanks: 424
Thanked 611 Times in 448 Posts
This strikes me as another facet in the large and unlovely turd of a scandal that is VW's dieselgate fiasco.

VW got caught and is currently being very publicly flogged by the media for designing a workaround in the vehicles' programming that when it detects a situation that suggests it is being emissions tested, it will work in such a way as to pass emissions. The rest of the time it is powerful and responsive and emits gases like 1984 Bhopal.

I have long suspected that the manufacturers are, to a certain degree, ALL designing to the mileage tests. I don't think it's a part of a conspiracy industry-wide to do so, it's just that they...do. Kind of like teachers whose feet are being held to the fire of mandated testing, they teach the kids how to fare well on the test while inadvertently forgetting to teach more relevant skills like how to assess problems, apply solutions, research, etc.

In other words, they (the manufacturers) are satisfying their own needs by building cars that excel at the test while being crap in the real world.

I believe the solution is to make economy as fun and sexy as it can possibly be. Yes, I understand that is a bit of a contradiction. But pitch the offerings to the public that way and then DON'T TEST THEM. Or at least, don't offer the government test results.

Offer the public's test results instead! Forget what it whistles up on a standardized program on a rolling road, here's how it does when driven by a nervous teen getting some practice miles in on the way to school, and then Dad takes it to the office. Here's the average mileage posted by hundreds of users, please note these are exclusively Grocery Store Run Ratings. Post Office Run Ratings will be different, your mileage may vary.

I understand the standardized tests ideally provide a consistent result that can then be used to compare between models, but if we're going to complain about how big the discrepancy is between the test and the real world, why then are we not providing real world results?

Hmm. I think I changed my own subject. And I don't have a really good answer for that last question. Any takers?

Sorry, bit of a rant.

Lead or follow. Either is fine.

Last edited by elhigh; 09-01-2016 at 10:44 AM..
  Reply With Quote
Old 09-01-2016, 11:08 AM   #3 (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
New test procedure:
1. Manufacturers send representative vehicles to a test facility.
2. Every jury pool within a 3 hour drive sends one or two members to test drive cars according to a scripted procedure for a day.

Bam! Real world-ish results.

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
Old 09-01-2016, 11:34 AM   #4 (permalink)
Master EcoModder
Join Date: Jul 2008
Location: NY state
Posts: 500

XJ Cherokee - '00 Jeep Cherokee Sport
90 day: 12.96 mpg (US)

FoFO - '11 Ford Focus SE
90 day: 36.78 mpg (US)
Thanks: 1
Thanked 49 Times in 37 Posts
I think the Mirage has a pretty big discrepancy here in the USA.

Didn't matter how hard I beat on it, I couldn't get it down to its EPA rating ...

There's a way to drive a GTDI engine. It is much different than a "regular" gasoline engine. Once you figure this out you can get good mileage - I strongly believe that's why many people cant't get good mileage out of the ecoboost engines.
  Reply With Quote
Old 09-01-2016, 02:04 PM   #5 (permalink)
EcoModding Lurker
Join Date: Mar 2012
Location: Ottawa, ON Canada
Posts: 27

FFE - '17 Ford Focus Electric
Thanks: 4
Thanked 4 Times in 4 Posts
By the way,
Keep in mind that 1 imperial gallon is equivalent to approximately 1.2 U.S. liquid gallons.
So, 70 UK mpg = about 58 US mpg.
  Reply With Quote
The Following User Says Thank You to jeongyun For This Useful Post:
Xist (09-01-2016)
Old 09-02-2016, 01:05 AM   #6 (permalink)
Master EcoModder
Join Date: Jan 2015
Location: Atlanta area
Posts: 410
Thanks: 966
Thanked 74 Times in 63 Posts
Miller88, how should one drive the turbo'd gas injected engines? I'm curious.

  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