Low gas mileage 18mpg - Hyundai Forums : Hyundai Forum
 3Likes
Reply
 
LinkBack Thread Tools
post #1 of 28 (permalink) Old 03-24-2019, 08:38 PM Thread Starter
Junior Member
 
Join Date: Mar 2019
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Greg Maisch is an unknown quantity at this point
(Thread Starter)
Low gas mileage 18mpg

I bought a used 2017 Elantra se with popular package about a month ago from a Hyundai dealsership, and I average 17-18 mpg with mostly suburban driving (after 3 fill ups). I know that the Elantra is rated for around 26 in the city (I know to expect slightly less then that) but 17-18 just seems way to low. I drive in eco/normal mode all the time (I’ve found that I get better mpg in normal mode) and I consistently coast to stops and am very light on the throttle. I replaced the air filter, and ran Techron through the fule system. Should I take it to the dealer for them to try to fix it?
Greg Maisch is offline  
Sponsored Links
Advertisement
 
post #2 of 28 (permalink) Old 03-24-2019, 08:39 PM Thread Starter
Junior Member
 
Join Date: Mar 2019
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Greg Maisch is an unknown quantity at this point
(Thread Starter)
**also I checked the tire pressure and it’s all good. The car has 45,000 miles
Greg Maisch is offline  
post #3 of 28 (permalink) Old 03-24-2019, 08:52 PM
Senior Member
 
DarrenBach's Avatar
 
Join Date: Dec 2017
Location: New London/WI/USA
Drives 2011 Sonata GLS 2.4L 2001 LaSabre 3.8L Once owned a new '90 Excel GL
Posts: 1,168
Mentioned: 4 Post(s)
Quoted: 419 Post(s)
DarrenBach is an unknown quantity at this point
Garage
You didn't say if you have AT or MT...none of the things you've mentioned should give you that poor mileage...if lower speeds, brakes hanging?

"If a man says something in the woods, and a woman isn't there to hear it, is he still wrong?"
Miles on her 155,600

Last edited by DarrenBach; 03-24-2019 at 08:52 PM. Reason: fix
DarrenBach is offline  
Sponsored Links
Advertisement
 
post #4 of 28 (permalink) Old 03-24-2019, 08:58 PM Thread Starter
Junior Member
 
Join Date: Mar 2019
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Greg Maisch is an unknown quantity at this point
(Thread Starter)
Itís an automatic transmission and it coasts pretty well so I donít believe that itís a brake issue


Sent from my iPhone using Tapatalk
Greg Maisch is offline  
post #5 of 28 (permalink) Old 03-25-2019, 08:28 AM
Senior Member
 
Join Date: Jan 2017
Location: Zephyrhills, FL. USA
2017 Elantra Eco - Black Trim - Jan. 2017 2014 Chevy Cruze 1LT/RS - Mar 2015 2015 Elantra SE
Posts: 111
Mentioned: 4 Post(s)
Quoted: 37 Post(s)
newsguy99 is an unknown quantity at this point
sounds like a fuel leak somewhere. I had a Dodge Neon do that, fuel rail, was botched from the factory.. The service adviser asked me how I got it to the shop. I told him I drove it. He said, he's amazed I didn't blow up, or catch fire.

Few weeks after the repair, it got traded in, as the clutch started to fail and Dodge kept saying, "Its suppose to slip like that".

Take it back to the Stealership, and ask for them to do a full look over.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
newsguy99 is offline  
post #6 of 28 (permalink) Old 03-25-2019, 09:24 AM Thread Starter
Junior Member
 
Join Date: Mar 2019
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Greg Maisch is an unknown quantity at this point
(Thread Starter)
Ok Iíll definitely do that ASAP because it seems like itís also a safety issue, thanks.


Sent from my iPhone using Tapatalk
Greg Maisch is offline  
post #7 of 28 (permalink) Old 03-25-2019, 10:59 AM
Senior Member
 
NicholasD's Avatar
 
Join Date: Jul 2016
Location: Central Wisconsin
2017 Hyundai Elantra Limited 1988 Toyota Supra Turbo 1982 Pace Arrow Motorhome 1986 Bayliner, Vol
Posts: 2,945
Mentioned: 122 Post(s)
Quoted: 983 Post(s)
NicholasD is an unknown quantity at this point
What are you putting in the tank, I averaged 17 mpg in a 37 mpg car, when all I could buy was E10 and received E0 instead.


Son go that with his E85 mini-van that is E85 compatible, instead of 28 mpg, only received 15 mpg, said that was a waste of money, cheaper by the gallon, but not on the cost per mile.


Hyundai says can go E15, but not E85, what's the difference, ethanol is highly corrosive, E15 is corrosive, but just takes longer than E85.


Filled up this morning, averaged 39.2 mpg using miles driven by last fillup divided by what the pump said in gallons. But we are still getting this rotten winter gas. This is combination city and highway driving. But prefer summer ethanol free gas that averages better than 51 mpg.


Gas leaks are easy if parked in a garage, entire garage will smell like gas.
NicholasD is offline  
post #8 of 28 (permalink) Old 03-25-2019, 11:05 AM Thread Starter
Junior Member
 
Join Date: Mar 2019
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Greg Maisch is an unknown quantity at this point
(Thread Starter)
I hate honestly donít know what fuel Iíve been using I know is the crappy winter fuel and Iíve just been getting standard fuel at speedway. I donít park it in a garage, but would still expect to smell gas somewhat if it was leaking.


Sent from my iPhone using Tapatalk
Greg Maisch is offline  
post #9 of 28 (permalink) Old 03-25-2019, 11:57 AM
Senior Member
 
mclasser's Avatar
 
Join Date: Mar 2008
Location: The Northeast
2018 Elantra Value Edition
Posts: 163
Mentioned: 2 Post(s)
Quoted: 51 Post(s)
mclasser is an unknown quantity at this point
Winter short tripping can slaughter gas mileage. Winter gas decreases MPG, along with long warmup times, and your fluids never properly getting up to temperature.

I did a lot of 3 mile round trips to our second office this winter and the trip computer read 20 mpg (hand-calculated was about the same, too).

My advice is to fill up your tank, reset the trip odometer and go on a 100-mile highway trip. Then, fill up again, divide 100 by the gallons of gas used and get true highway MPG. If that's in the 30s, there's nothing wrong with your car. If you regularly use non-Top Tier gas, throw a bottle of Techron cleaner into the tank every year to clean up any deposits.

Last edited by mclasser; 03-25-2019 at 12:00 PM.
mclasser is offline  
post #10 of 28 (permalink) Old 03-25-2019, 12:26 PM
Senior Member
 
Join Date: Feb 2014
Location: Phoenix, AZ
Drives 2013 Elantra GT, MT, Style/Tech, 1.8L MPI Nu
Posts: 726
Mentioned: 6 Post(s)
Quoted: 211 Post(s)
CyprusCorner is an unknown quantity at this point
Be more descriptive of your driving conditions. What type of driving do you do? what city do you live in? how many minutes do you spend idling, at 35mph, 45mph, or highway speeds. Do you have snow where you live, what have the average temps been?

Someone commuting through NYC will get drastically different mileage than someone driving out on country roads with a speed limit of 50mpg.

Let figure out if the problem is your driving style, don't jump to conclusions about a fuel leak.... What car did you have previously and what was your mileage under the same driving conditions?
CyprusCorner is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Hyundai Forums : Hyundai Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome