So earlier this year, Jan. 2023, took my car to my mechanic for oil change. It was down 2.5 qts and I had no idea - no engine lights, running ok, no smells. Did the change but checked it every weeks, then drove it to New Mexico in March and back and kept dumping oil into it. Car had about 75,000 miles on it.

Heard from a friend about the Hyundai Engine Replacement test. Also read about the class action against them online. Their neighbor did the test and had the engine replaced. Funny how Hyundai is NOT forthcoming and TELLING OWNERS about this and not wanting to replace the engines they know are bad. Kind of like the anti-theft thing. They tell me I don't need the upgrade because I have the push button start - but isn't that how the thieves are starting them with a cell phone cable? That's another issue....

In August, I go to hyndai dealership where I bought it used 4 years ago and ask about this. The service guy was great and put me right in the 'test program'. So they took pictures of the cylinders (I guess),did oil change, sealed it and off I went for 1000 miles. Have only 77790 miles on it. They checked and down 1.5 qts in 1000 miles at 78768!!!! Good thing I stayed local. Another thing is they were saying I need a new VCM, battery, some other stuff for $2000 - yea NO thanks.

After I get back they cleaned the cylinder chambers, did oil and now I am in the second 1000 mile test. Good thing I go to Indiana 1-2 x month at 500 miles round trip. During this time the VCM doesn't act up yet it still rattles but doesn't hesitate as much. I have to run it up to 79790 and then we shall see. The service guy told me if it's down again, they replace the engine. I hope this is true because otherwise, it's a junker and I'll trade it for an older TOYOTA!

Now the decision is - a 4Runner or Camry. and what color...I will not ever buy a Hyundai product again after this mess.

We have a 2016 Sonata Limited we bought brand new and it currently has 61,000 miles. Overall we had felt the car was a good value ...up until this year that is... because it feels like the "BEST IF USED BY" Date Expired.

I heard the engine ticking for a few months and then in February the oil pressure light would come on once in a while. Took into the dealer in March and found it was 3.5 Qts low!

But I digress... I want to add the story of how absurd the stupidity of the inept Service Dept Yahoos was. I share this so you understand that when they say "no" you should not give up. Sometimes being nice isn't enough and you need to escalate higher - well this was one of those days.

Me and this Service Dept. Rookie Order Taker were butting heads from 1st minute (you ever meet someone you just feel friction with even though you never met - well that was him). He comes up and ask me, "why are you here?" I said, "we have an appointment to take photos of the peeling paint to send to Hyundai Corp, and also since then, I've also noticed that our oil light is coming on" I could tell he wasn't listening. He asked for the key, sits in the car and runs through the dashboard error messages. Then he looks up at me and says, "the service light isn't on." I replied, "it's the oil light." to which he replies, "Well that's different." I said, "I know it is - it's what I said".

As a side comment I said, "the oil might need to be topped off". He quickly says, "I am not allowed to top off the oil without first doing an oil consumption test". I reply that that doesn't seem right, I can go to any oil store and they will top off fluids in between servicing. He says, "we are not allowed" I said "I don't have time for that, please just take the photos and top off the oil and I will bring it back next week to do an oil consumption test". Again he says, "we are not allowed"

So, I asked for the manager. I told him about his rude comments and saying he won't put oil in the car, I said we did our last oil change here and now the lights on and its not due for it's next oil change yet. Manager says, yeah he's right but we will check the oil level and I'll make sure they fill it.

Manager comes into waiting area and says " you were 3.5 qts low and I replied, "and he was going to send me away without topping off my oil" Manager reiterates that mantra, "we are not allowed but we did it as a courtesy" and then the Mgr shows me a photo of my oil refill cap with sludge buildup and initially he said it's usually due to a lack of maintenance". Well, I squashed that subtle accusation real quick because I reminded them that they've serviced the car at that dealer since we bought it and they did our last oil change!

So, manager says he'd like for me to bring it back next week for the photos (I was there for in the first place) and they will do the first Oil Consumption test at no charge. I agree and thank him for topping off the oil and say, I can't believe he was going to send me away 3.5 Qts low without ever checking" He nods.

Anyway... I wanted to make sure that I didn't have an oil leak because THAT'S A LOT OF OIL to lose between regular oil changes and this was the first time it had happen. So I had read a little about the engine failures and fires and Class Action so I didn't want to get railroaded into them saying it was my fault and so I took my car to a trusted mechanic and explained my situation. To my surprise he confirmed there was no oil leak and now I knew I was burning oil but why? So I started looking up that issue and quickly came across an article about a pending Class Action Suit over this very matter."

This is where I am now... I have lost 1.5 Qts in less than 1,000 miles since March 24 and my next appointment is April 24th and they put an anti-tampering device (I guess so we cannot drain the oil and pretend the issue is more serious than it is... whatever (why would someone destroy their own car? Ridiculous!!

From what I've read... this oil consumption matter is a very serious issue and I hope the courts force settlement in the favor of the consumer and do it sooner than later. Engine knocking is a sign of impending engine failure if left unaddressed. You can read it for yourself. Oil flow is restricted in these engine types because of poor engine block design and milling techniques that allow milled metal shavings to remain in the internal block where oil will flow. Once car starts rolling on the road it's only a matter of time before the oil flow is blocked. This leads to internal issues with adequate oil flowing to cool and circulate and that causes oil to burn and cause eventual failure. In worse-case scenarios this sticky gunk will cause pistons to stick and throw a crank rod through the engine block and the leaking oil ignites and the car is a loss, (this is also a documented failure event).

Because Hyundai knows this oil flow and oil consumption issue will eventually lead to complete engine failure - Hyundai was insisting (In several earlier cases) that they be allowed to install a type of throttle restrictor so that "if the device senses engine knocking it will restrict torque to a maximum speed. Sound like a good idea, but once this is on your car, Hyundai won't remove and from what I can gather they are not replacing the engines and the owners are stuck with cars they can't drive safely on the highway because of the acceleration restrictions from the device BUT they are still paying for a car they cant drive.

Hyundai could very well go under if they are forced to recall so many cars for such an expensive recall reasons but many people are on the hook for cars they can't drive and repairs they can't afford as Hyundai systematically shields itself from liability. This effects several engines that both Kia and Hyundai share.

Oil consumption issues are related and known to cause eventual engine failure. The pending Class Action lawsuit against Hyundai and Kia spans several years makes and models.

Purchased my used Sonata back on 12/5/22, about 2 weeks later noticed the oil light would come occasionally while taking turns. I didn't think anything of it until it happened when my bf was in the car with me. Later on that day he checked the oil level for me and said there was hardly any oil in the car and asked if I was sure the dealership ran this car through make ready?? I saw that they did, so why would my oil level be so low?? Haven't had any leakage issues. So we did some research. Came to find out there is a class action lawsuit against Kia/Hyundai for certain models/years with oil consumption issues.

I took my car back over to the dealership where I purchased it from and asked for them address issue. After going on for now over a month and a half, almost 2 months now, Hyundai is refusing to replace the engine when they know and have said clearly the engine is burning oil at a higher rate than normal, all because the engine light has not turned on to signify there is a major problem. Basically put, it wasn't their problem. I asked if I was supposed to drive around in my car until the engine seizes causing an accident or death to me or someone else with a family/children in their car? They have no response and still refuse to replace the engine. And as far as where my car is for repair? Who knows? Neither the original dealership or the Hyundai dealership 10 miles away (that was to replace the engine) know where my car is or have a check in record/receipt of where my car is.

Theta II engine is a known problem, and Hyundai has been replacing/repairing under a class action suit... And has extended warranty on drivetrain up to 120,000 miles, , I had approx 79,000 miles on vehicle when issue began, but since I was second owner, factory warranty reduced to 60,000 miles.

My Car began excessive oil consumption ( approx 3-4 qts per 5,000 mile) and local dealer has been made aware of issue. Dealer had me bring in vehicle 3x's over next several thousand miles to confirm oil consumption, and mechanic finally confirmed that engine needs replacement, as stated on RO. Dealer never did confirm source of oil loss

Spoke to Hyundai customer care in California and they gave me the run around, person taking call was absolutely no help, and had limited knowledge of the Theta II issue. Told me to take it up with the dealer. . Spoke to Hyundai dealer general manager ( very good guy), he got back to me promptly after speaking with Hyundai himself , however , he was told that unless car had an actual knock/vibration etc., they would not replace engine.

I let him know that car has been well maintained and oil changes performed at Hyundai dealer at recommended intervals ....GM told me to bring car in if it starts knocking, but to keep regular oil; changes at dealer.

I'm not sure if I should pursue this with Hyundai, wait for engine to die, or attempt to get my third party extended warranty carrier involved ( EasyCare )

Discover this problem last of April while my car was under warranty. Took it to the dealer was told it was not burning oil, gave me a system clean cost 595.00, said it would take care of it. Next 1000 miles still 2 quarts low, but told me to drive it another 1.000 to see how bad the problem was. 2000 miles later after my warrantee expired was told I needed a motor replacement. but drive it another 1000 miles or 2 months to measure how bad it is, WHY. I CAN'T DRIVE IT WITH OUT GETTING THE SMELL OF BURNING OIL ALL OVER ME, DOWN MY THROAT AND EVERY WHERE. I NEED THEM TO HONOR MY WARRANTY FROM THE TIME I STARTED THIS PROBLEM IN APRIL.

After the engine started using a lot of oil between oil changes, I brought it to the dealership to be taken care of under my extended warranty. The warranty company wanted an extra 1000 dollars just to look at the issue. The service manager told me not to spend the money and just continue to check and fill the oil. This was at about 116k miles.

I was driving to work one day and all was fine but then the car started to misfire terribly. After diagnosing that the 4th cylinder had lost compression, I had the car towed to Johnson Hyundai of Cary. They sent what they found to Hyundai only to tell them they're not going to fix it because it wasn't an internal bearing issue. This is garbage, especially after they know soon as these engines start to use oil, they will fail as mine did. I called corporate to complain and am waiting on a call back.

Terrible business practice from Hyundai and I still owe 7k on the car and I can't even drive it. I run my side business with this car. They need to replace this engine with no cost to me at all. This is not a wear and tear item.

I bought the car used as is on12/ 07/2022 after having had to have a spark plug replaced a few days latter 12/12/2022 because engine was running on 3 cylinders, now on 12/26/2022 oil light came on immediately checked oil level it was down over 2 1/2 ltr . After consulting with Nova Automotive engine rebuilders solution would be to replace the engine which would cost as much as what the car is worth or to drive it putting a ltr or so of oil in every two days or so. eventually the engine will fail again due to carbon deposit on plugs or cylinder.

This will likely cause your engine to be done for and have to be replaced. At least that's my current problem. My engine is now out of commission with a misfiring piston due to lack of lubrication and little to no compression. Auto shop says this is likely because of how often my car consumed oil and burned it off too quickly. I would get an oil change around every month and got to a point where I put 1.5-2 quarts of oil (5W-20 full synthetic) weekly. A car only 5-6 years old shouldn't have that big of an issue burning oil. If you're looking at a certified preowned 2016 sonata (mine was and I bought it January 2017) it's still not worth it. Find a more reliable vehicle.

In July 2022 I took to dealership in Ofallon, IL and explained that I was putting in about a quart or 2 of oil in every week. They replaced valve cover gasket and oil pan gasket. That did not fix the problem. They then did a bearing test. It passed but continues to consume oil. As of 15 Dec 2022 I have had to replace spark pulgs 2 times becasue they are fouling out with oil in the spark plug area, and have put in still about 1 to 2 quarts a week of oil. No end in site and the dealership (That I bought it from) will do nothing.

You'd think I'd learn not to buy a Sonata but here I am again. Have had this 2016 Sonata about 3 years and it has been fine until this summer. Started making a weird noise like a plastic bag is caught underneath it.

June -Took to my mechanic and he says "you know, it's down about 1.5 quarts of oil, but there's no leaks". They add oil and off I go. I drive to Indiana about 5 hours one way, minimum 1 x per month so this car better last right?...

It's been to Florida and back and recently to Memphis and back with no problems so I'm thinking this is weird.

August - check oil again and down another quart. I use full synthetic oil too. Add oil and on the road again. Still making that plastic bag sound and the mechanic can't figure it out.

September - down another quart, same noise, no resolution. The dealership is no help either.

Now I'm searching for a brand I know but it has also had issues recently - Toyota Camry. I'd try an Altima but have heard the nightmare stories about those too. Good thing I have a 99 4Runner that runs like a top.

My bad for getting another Sonata after the 2013 had the engine seize.

WORD - DO NOT GET A SONATA! This should be a class action lawsuit against Hyundai.

Update from Oct 2, 2022: Read there was a class action lawsuit against Hyundai/Kia for this problem. Excessive oil consumption and then engine failure.

Maybe Hyundai will actually do a recall.

I also found out that changing the PCV valve will help a little bit.

I just made a 250 mile drive to Indiana and having to go get oil to add already. Yep, I'm looking for a new car and will NOT buy a Hyundai again... ever.

This is costing us $75 per month in oil costs, not counting having to replace the oil filter every 3 months.

We had the "oil consumption test" at the recommendation of the dealership service department... with 1000 miles between each check... only to be told yes, it needs the motor replaced, but now has too many miles and is too old to be covered under any warranty.

WHAT THE HELL!!

If we had known anything about this issue before we would never have even bought the damn car. The replacement engine and labor was more than we even paid for the damn vehicle!!!

We feel we need a replacement vehicle for our trouble, but I doubt that will ever happen. It will be the last damn Hyundai we EVER own.

At the very least we should be provided a loaner vehicle for minimal rental costs and Hyundai should replace the engine and service the whole vehicle at no cost to us.

I bought my car from a Hertz dealership as the second owner with only 74,000 miles on my vehicle. I started bringing it to the Centereach Hyundai dealership to do all of my service because I had another vehicle from them previously and they always serviced my vehicle. I started burning oil not even a month after buying the vehicle and they told me I needed to do an oil consumption test. I have done seven oil consumption tests for them to tell me that I’m not covered as the second owner only gets the first 60,000 miles on the car.

I called manufacturing and manufacturing had me bring it to Huntington Hyundai. And they told me the same thing. And then when I called manufacturing back after all that work, they told me the same thing. What I don’t get is why have me do an oil consumption test over and over and over again I’d have to continue buying oil in between tests while waiting for answers only to be placed running around and told no. This recall was issued back in 2016 when the vehicle was first created and put on the market. Same thing with the Kias. If I had known Hyundai was not going to do right by their customers, I would not have bought another Hyundai. I have done nothing but take care of my vehicle since I’ve gotten it and have replaced anything that’s needed to be replaced immediately instead of waiting.