Last post on May 18, 2013 at 10:29 AM
You are in the Hyundai Elantra
What is this discussion about?
Hyundai Elantra, Fuel Efficiency (MPG), Hatchback, Sedan
#537 of 745 Re: Use today's EPA method & data for our Elantras [gman4911]
Jun 18, 2012 (9:07 pm)
There's so much mis-information in this post, I'll just link the EPA test criteria here. It includes 18% idling time for the city, 80mph driving factored into highway, and tests with A/C on.
EPA Test Information
#538 of 745 Re: Use today's EPA method & data for our Elantras [gman4911]
Jun 18, 2012 (9:17 pm)
On the highway, it means a 10 mile route with little to no traffic, your avg speed is 48 MPH, your top speed is 60 MPH, as level terrain as possible, nice weather, no A/C.
Where did you get this information?
#539 of 745 Re: Use today's EPA method & data for our Elantras [dodgeman07]
Jun 18, 2012 (9:44 pm)
What part is mis-information? Everything I listed came from that site. I just did not point out EVERY test.
#540 of 745 Re: Use today's EPA method & data for our Elantras [m6user]
Jun 18, 2012 (10:04 pm)
#541 of 745 Re: Use today's EPA method & data for our Elantras [gman4911]
Jun 19, 2012 (6:12 am)
What you described in your original post was just the two testing phases that took place prior to 2008. In 2008 the EPA added 3 additional tests. If you click on the additional 3 tabs you will see the additional testing post 2008 which includes 80mph speeds, A/C use etc. The city tests include about 31 minutes "drive time" of which about 6 is spent at idle which I assume to is to simulate traffic lights/stop signs. Since we are talking about the 2011/12 Elantra, it would have been tested using all 5 phases which would include 80mph, A/C use, etc.
So the information provided in your original post was incomplete, incorrect and misleading.
#542 of 745 Re: Use today's EPA method & data for our Elantras [m6user]
Jun 19, 2012 (7:33 am)
>>>So the information provided in your original post was incomplete, incorrect and misleading.
What are you talking about? The information in my post is just for the city & hwy tests which are the big numbers posted on the window sticker and to which everyone compares their results to. That is what everyone is bitching about not being able to achieve.
Some people are under the impression that the EPA tests involve an entire tank of gas when the reality is that it only involves 10 or 11 miles of driving.
Assuming the car is not defective, if you drive the car using the same parameters in those two tests, you should be able to achieve those numbers.
The point of my post was to offer a way for people to prove whether or not their cars were defective and whether or not the car was capable of achieving the EPA numbers.
The three additional tests is what gives the city and hwy tests the 'range' of what to expect. IOW, for the Elantra's city test, the rating is 29 but the range is 24 thru 34.
#543 of 745 Re: Use today's EPA method & data for our Elantras [gman4911]
Jun 19, 2012 (11:16 am)
What? You are mistaken. The City and Hwy numbers factor in the A/C on, High Speed, and Cold Temp testing. That's why those numbers dropped in 2008 for every car on the market.
You (apparently) believe only the combined number includes those tests. That is incorrect, all the reported numbers factor them in. The current City and Hwy EPA estimates are not derived solely from the City and Hwy portion of the testing.
Here's an example from the 2007 Elantra's revised number's factoring in the 3 additional tests: EPA Ratings 2007 Elantra
#544 of 745 Elantra GLS finishes last in MT 40 mpg test; MPG driver dependent
Jun 22, 2012 (11:00 am)
Check out the August issue of MT. Test 6 40-mpg cars and Elantra comes in 6th. Mazda 3 comes first.
They publish FE results for each car for each of 4 different drivers. Elantra has the highest standard deviation (3.1). As they put it, "Our differing driving habits had nearly 10 times the influence on the Elantra's mileage than on that of the Focus. Perhaps the Hyundai's more susceptible to enthusiatic outbursts?"
MT's overall FE result for GLS was 35.4 mpg. The avg. for the 4 specified drivers was 36.2 mpg, but the highest driver achieved 39.1 mpg and the lowest a mere 31.3 mpg.
Their FE chart shows Elantra achieving 40 mpg highway at speeds at or under about 65 mph. After that, MPG falls under 40 mpg.
Their overall test results for the 5 gasoline-powered cars:
Honda Civic HF= 39.4 mpg (5-spd AT)
Chevy Cruze ECO= 39.3 mpg (6-spd manual)
Mazda 3= 37.8 mpg (6-spd AT)
Ford Focus SFE= 36.6 mpg (6-spd dl-cl AT) (lacked cruise control)
Elantra GLS= 35.4 mpg (6-spd AT)
#545 of 745 Re: Elantra GLS finishes last in MT 40 mpg test; MPG driver dependent [g2iowa]
Jun 22, 2012 (11:40 am)
When you say the Mazda3 came in first, do you mean in the overall evaluation? It was 3rd of the gas-powered cars.
Interesting that they picked the MT on the Cruze but ATs on the others. Not apples to apples. I expect the Cruze AT would have fared worse based on other reviews, including one by C/D recently.
If I am not mistaken, all of these cars exceeded their EPA averages. The results on the Elantra with different drivers helps explain why many owners are reporting less-than-expected FE, while others are happy with FE.
#546 of 745 Re: Elantra GLS finishes last in MT 40 mpg test; MPG driver dependent [backy]
Jun 23, 2012 (7:20 am)
Yes, the Elantra came in last place for both FE and in the overall comparison test. The Mazda 3 Skyactiv came in third for FE and first overall.
As regards their Chevy Cruze ECO, per MT, "We wanted to drive the [MT] version precisely because of its no-compromise 28/42 mileage." They point out how even its gas tank is 3 gals smaller, an exclusive for the MT model.
The other very interesting feature of this test comparison is how they point out the "percentage difference" figure: "how depressed this is compared with these lap's theoretical mpg modeled from our constant-speed mileages--that is, what they'd ideally do were they unimpacted by accelerating, fidgeting with the throttle, hill-climbing, and stopping." They base this off of their 27.3 miles real world driving loop. Elantra's FE fell by 24%, Cruze ECO by 30%, Civic HF by 25%, 3 Skyactiv by 25%, and Focus SFE by 20%. As they put it, "If you don't drive very gingerly, pay attention to this [figure]."
So for drivers not focused too much on FE or who just have a heavy foot, MT estimates these drivers will lose upwards of 25% FE from the possible max. This is most important for the Elantra as MT's figure show the GLS achieving the lowest FE at every constant MPG.
Here is their constant MPG chart for the GLS, their "theoretical maximum" for each speed point:
35 mph= 51 mpg
40 mph= 52 mpg
45 mph= 52 mpg
50 mph= 50 mpg
55 mph= 47 mpg
60 mph= 44 mpg
65 mph= 40 mpg
70 mph= 37 mpg
75 mph= 35 mpg
Note, at highway speeds in their test with this specific GLS, 40 mpg won't be achieved at speeds over 65 mph. So drivers routinely driving 70-80 mph won't get 40 mpg.