2011 Sonata Limited 2.4 - FUEL ECONOMY - Hyundai Forums : Hyundai Forum
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post #1 of 12 (permalink) Old 05-15-2019, 04:43 PM Thread Starter
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Question 2011 Sonata Limited 2.4 - FUEL ECONOMY

Currently I do about 60% highway/40% city driving, although I should qualify that by saying I live in Los Angeles. My Sonata is a 2011 Limited 2.4 with just over 80k miles. The best I can do on a tank is (according to the car's gauge) 22.3 mpg, give or take. If my driving is 80% city then I'll get no better than 19.7 mpg. I'm not a particularly aggressive or defensive driver...pretty much in the middle. I also rarely use climate control except during extreme heat or cold, which in L.A. amounts to about 2-3 months per year.

Is this poor fuel economy, especially in comparison to the 22/35 Hyundai claimed, something everyone has experienced? Is there anything I should do to improve my numbers (e.g., switch from 87 to 89 octane gas, etc.)? What kind of mileage are you all getting? Thanks in advance to all who comment!
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post #2 of 12 (permalink) Old 05-15-2019, 06:10 PM
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On a 200 miles trip 70+ mph, A/C on, stop and go in Milw. for 15 min...I averaged 40.1 mpg. City is 26 to 31...I'm easy on the gas and rarely come to a complete stop at stop signs. These are all readings from the dash and not manually calculated. The car is original and has 156,000 miles.

"If a man says something in the woods, and a woman isn't there to hear it, is he still wrong?"
Miles on her 156,000
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post #3 of 12 (permalink) Old 05-15-2019, 07:02 PM
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fuelly.com is a great website to track your own cars MPG by entering the fill up data each time. You can also browse what other owners of similar cars get for their own mileage. Here is a link to show the 2011 Sonata Ltd with 2.4L engine:

2011 Hyundai Sonata Limited MPG - Actual MPG from 15 2011 Hyundai Sonata Limited owners


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post #4 of 12 (permalink) Old 05-15-2019, 07:20 PM
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I've never gotten less than 26 with my GLS. Not sure how much stop-and-go you have on your trips, though I know LA has a lot of traffic.

I would get a second opinion on your driving, maybe from a friend, try to avoid traffic, lights, stops, hills, etc. Maintain your vehicle, some components may decrease mileage if not kept in good shape, like tires with low pressure.


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post #5 of 12 (permalink) Old 05-15-2019, 11:20 PM Thread Starter
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Originally Posted by hg3300 View Post
I've never gotten less than 26 with my GLS. Not sure how much stop-and-go you have on your trips, though I know LA has a lot of traffic.

I would get a second opinion on your driving, maybe from a friend, try to avoid traffic, lights, stops, hills, etc. Maintain your vehicle, some components may decrease mileage if not kept in good shape, like tires with low pressure.
I've been told many times in my life that I'm a safe driver...code word for "not an overly fast driver," I'm sure. LA traffic is definitely at the high end of the spectrum. Lots of stop-and-go, short distances between stoplights, etc. It's also not as flat in LA as most people think. But regardless I've taken care of my car and get regularly scheduled oil changes and maintenance, etc.
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post #6 of 12 (permalink) Old 05-15-2019, 11:24 PM Thread Starter
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fuelly.com is a great website to track your own cars MPG by entering the fill up data each time. You can also browse what other owners of similar cars get for their own mileage. Here is a link to show the 2011 Sonata Ltd with 2.4L engine:

2011 Hyundai Sonata Limited MPG - Actual MPG from 15 2011 Hyundai Sonata Limited owners
Thanks so much for recommending that site! It does seem like plenty of other people are having my same issue with low fuel economy, all at the same time more people are getting much better numbers. I fully understand living in Los Angeles is probably among the worst driving conditions in the country. That has to be playing the biggest role in this. but it may be that I should get my car checked out and see if the dealer can find anything. Is this something I need to go to the dealer for, or would a trusted local mechanic be better and/or more reliable?
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post #7 of 12 (permalink) Old 05-15-2019, 11:25 PM Thread Starter
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Originally Posted by DarrenBach View Post
On a 200 miles trip 70+ mph, A/C on, stop and go in Milw. for 15 min...I averaged 40.1 mpg. City is 26 to 31...I'm easy on the gas and rarely come to a complete stop at stop signs. These are all readings from the dash and not manually calculated. The car is original and has 156,000 miles.
Wow! Well I'm sure you're driving conditions in Milwaukee are significantly less awful than the ones in Los Angeles, but that doesn't explain such a huge difference in fuel economy. I'm starting to feel more and more like there's something wrong with my car. I definitely am not an overly aggressive driver by any means.
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post #8 of 12 (permalink) Old 05-15-2019, 11:26 PM
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Originally Posted by ajacobs79 View Post
I've been told many times in my life that I'm a safe driver...code word for "not an overly fast driver," I'm sure. LA traffic is definitely at the high end of the spectrum. Lots of stop-and-go, short distances between stoplights, etc. It's also not as flat in LA as most people think. But regardless I've taken care of my car and get regularly scheduled oil changes and maintenance, etc.
Most likely LA traffic causing low mileage, not sure what else but if you have an opportunity to take a reasonably long trip on a highway that isn't bogged down by traffic that might give you a better idea of how good your mileage is.


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post #9 of 12 (permalink) Old 05-16-2019, 09:41 AM
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Check your injectors...I just got back from a 400mi round-trip and I averaged 38.5 highway. When I'm just knocking about back and forth to work I'm generally in the 25.5 to 26.5 range. For a while I was getting 22 or so city and only about 33 highway and found I had on injector completely shot and another almost gone. I had the dealership replace all 4 (it was only about $180 more) and now it runs well...except for my oil-burning engine which is getting replaced next week

So for me, new injectors, new engine, I am cautiously optimistic my little Sonata will be running like a new car in a few short days!
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post #10 of 12 (permalink) Old 05-16-2019, 10:03 AM
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You can't compare LA to other places. Stop and go will destroy your mileage. Even though you say 80% or XX% stop and go...how much time is sitting at a standstill waiting to creep 100 feet or whatever. How much coasting...how much acceleration on non-level pavement...tires mounted weight...tire pressure...etc...etc. Its very difficult to compare ultra urban driving in a city with over 4 million to a city with maybe 600K.

I agree with the advice of taking it out on an extended trip and seeing what happens.

And keep in mind that the EPA numbers on the window sticker are to give a comparison from "vehicle to vehicle" so that if you are comparing a Ford Fusion to a Hyundai Sonata to a GMC Yukon; those are the numbers that are generated for that test. It does not mean you will get those numbers in your environment.
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