2019 Kia Optima: excessive oil consumption

Filed Jan 20, 2026 · Engine · 112,000 miles · CA

The contact owns a 2019 Kia Optima. The contact stated that while the vehicle was parked, there was sputtering sound coming from the engine compartment, with the check engine warning light illuminated. The contact stated that while driving at an undisclosed speed, the vehicle was running rough. The vehicle was taken to the independent mechanic where it was diagnosed with a cylinder misfire and burned spark plug, and that there was oil inside the cylinder and on the spark plug. The contact was informed that the parts needed to be replaced. The vehicle was repaired but the failure reoccurred months later. The vehicle was taken back to the same independent mechanic where it was diagnosed with oil consumption, oil intrusion into the firing chamber, and that another spark plug needed to be replaced. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 112,000.

Filed Jan 13, 2026 · Engine, Fuel system · IN

I purchased this vehicle on [XXX], with approximately 170,150 miles. On [XXX], during a routine oil change at approximately 172,636 miles, it was discovered that the engine had no oil present. Shortly afterward, the oil warning light began flickering intermittently while driving. On November 4, 2025, at approximately 175,495 miles, a certified mechanic again confirmed that there was no oil present in the engine. At no point were there visible external oil leaks, indicating excessive internal oil consumption. This condition creates a serious safety risk, as sudden engine failure while driving could lead to loss of power, stalling, or accidents. Based on my experience and publicly known issues involving Kia engines, this appears to be a systemic defect rather than normal wear. I am requesting that the federal safety agency document and review this issue as a potential safety defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 11, 2025 · Engine · AZ

I purchased a used 2019 Kia Optima from a dealership in January 2025 with 103,000 miles. 11 months later it's burning oil. Every 2 weeks I have to add a quart of oil. I took it to my mechanic and they found cylinder 4 has been burning oil. They also found a technical service bulletin related to engine oil consumption. They recommended replacing long block assembly. They referred me to a Kia dealership. Currently, my vehicle is at a Kia dealership. They performed a "leak down test" and found cylinder 4 has been burning oil and recommend a long block assembly. I have a 3rd party warranty on my car. They are currently reviewing this claim. If they decide to replace the long block assembly, there will be additional uncovered costs that I feel Kia should be responsible for. I have only put 7,000 miles on this car since I bought it 11 months ago. The car currently has 110,500 miles on it. I understand this is a used vehicle but engines should last 200,000+ miles. I'm trying to figure out my rights. By law isn't the dealership responsible for this oil consumption loss and long block assembly replacement?

Filed Dec 9, 2025 · Engine, Transmission · TN

Unknown needing help with new purchased car. Bought this car October/2025 with 93k on engine. Already been to dealership i Bought it from to have current issues im dealing with checked out and they only listen to it and said it was injector ticking clatter. Since then ive seen white smoke and the car burning excessive oil. I am adding oil to the car every 2-3 days. Still noticeable smoke and smell of burning oil. No recall on this vin. It seems as if this is a huge problem with this engine. Please help

Filed Dec 2, 2025 · Engine, Fuel system · KY

My vehicle is consuming oil excessively. I have to put a whole quart of oil in my vehicle every 2 weeks. I am adamant about getting regular maintenance oil changes as well. My car had to be towed to a local auto shop due to the engine stalling and accelerator not working. They had to replace all 4 coil packs and 4 spark plugs due to dark, tarry oil covering the parts. The repairman told me my engine was at risk of failing, and that the repairs he did would not last without a new engine. I am worried about the car stalling or failing while driving, which puts an accident occurring at greater risk. My complaints resemble symptoms tied to previous Hyundai/Kia engine recalls. I am requesting investigation and manufacturer action related to this issue.

Filed Jul 29, 2025 · Engine · NE

I am the owner of a 2019 Kia Optima FE with the 2.4L GDI engine (Theta II). Despite following a consistent maintenance schedule with synthetic oil changes every 4,000 to 6,000 miles, the vehicle is experiencing premature engine failure. Specifically, the engine has internal valve damage, and the shop diagnosed the issue as failure of an internal valve component. The vehicle also has a leaking axle inner boot, but the major concern is the engine. Kia has refused warranty coverage, goodwill assistance, or recall support despite this engine being part of a long-standing pattern of issues documented across many Kia and Hyundai vehicles with the Theta II platform. I still owe approximately $10,000 on this vehicle, and now face a potential $5,000+ repair due to a known manufacturing defect. Kia Consumer Affairs and the dealership both declined assistance, claiming my warranty has expired, even though this engine has been involved in class action lawsuits, extended warranties, and TSBs related to premature wear, oil consumption, and mechanical failure. I am submitting this complaint to formally report the issue and to urge the federal safety agency to continue investigating Kia’s 2.4L Theta II engine failures, as they represent a potential safety and financial risk to consumers. Many drivers are left stranded or in serious debt due to an engine defect they could not have prevented.

Filed Jun 15, 2025 · Engine · FL

The engine appears to be consuming an abnormal amount of oil. There are no visible leaks or external damage, and the vehicle has not yet stalled or failed, but oil levels drop rapidly between oil changes. The engine is available for inspection upon request Driving with low or empty oil levels risks sudden engine failure while in motion, which could lead to loss of power, stalling in traffic, or even a crash. The oil warning light came on and went off at regular intervals unexpectedly during driving this week, which prompted me to get it to my mechanic asap to avoid potential engine damage or failure. They performed an oil change (even though I had done it there for this same car only 2133 miles ago NOT YET. I have contacted the dealership and have been advised to monitor the oil level or potentially conduct an oil consumption test. I have not yet received a formal diagnostic or confirmation from Kia or a third party. Yes the vehicle was formally inspected by Gettel Kia of Bradenton on 14th Street for an engine stalling issue... Have experienced a stall only once since then Yes. The oil warning light turned on (and off several times in 1 minute intervals) for the first time around 132011 miles. Upon the mechanic checking the dipstick, the oil level was significantly below minimum. No check engine light appeared. An oil change was performed only 2133 miles since the last one. Additional Notes: I have discovered multiple similar reports from other 2016–2020 Kia Optima owners via online forums such as Reddit and Kia owner groups, suggesting this may be a widespread issue related to the GDI engine design. These cases often go unresolved until engine damage occurs. I am requesting: A formal oil consumption test A full engine inspection Repair or replacement if the issue is confirmed Consideration for goodwill or warranty extension due to potential manufacturing defect I am maintaining oil top-off records and would be happy to provide them

Filed May 30, 2025 · Engine · MI

Original owner, received in mail that this vehicle was recalled for engine issues. Provided a lifetime warranty for engine. Noticed my vehicle began consuming oil more than normal. I constantly have to put oil in the car 2-3/ week. The shops say it doesn’t need an oil change the oil is burning fast. Never notice any leaks bit my vehicle began to not pick up speed and shop said the oil is burning and possible engine is getting ready to go. Called dealership and they said they won’t replace u less the engine is totally blown and I need to have all type documents showing I’ve been doing maintenance although this is a known issue. Constant oil changes.

Filed May 1, 2025 · Engine · 65,000 miles · TN

The contact owns a 2019 Kia Optima. The contact stated that while driving at various speeds, an abnormal engine oil consumption was noticed. The check engine oil warning light illuminated abnormally often, shortly after an oil change had been performed. The vehicle was taken to a local dealer, where it was diagnosed with defective piston oil rings. The vehicle was not repaired due to the warranty being deemed invalid. Upon further investigation, the contact related the failure to an unknown recall; however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 65,000.

Filed Apr 3, 2025 · Engine · MI

My engine is burning oil at an alarming rate, my car is not recognizing low oil, so I no oil lights are appearing. I have to go to the oil change place weekly to have my oil checked. When my oil is low, I have to pay to have my oil replenished between months of my oil changes. My and my son safety was put at risk, when I found out at an oil change visit, I had less than an quart of oil I was driving around with. Which can cause engine failure while driving, overheating, and reduced performance while driving. This was confirmed by an oil change facility. I am currently in a ongoing dispute with the dealership I received my car from. The Kia dealership is refusing to do any maintenance until I can produce five years of oil change records that are not showing on car fax. To date my car oil light is not coming on, no signs are shown in my car showing this issue. I have to just get it checked weekly and pay for oil to be safe until, I can get a new engine.

Filed Mar 31, 2025 · Driver assistance, Engine · VA

Oil is getting into cylinders causing spark plugs to misfire. Very high oil consumption so I have to put oil in it every other day in between oil changes. I’ve been to Kia Service department several times in the past 2 months.

Filed Mar 26, 2025 · Engine · GA

My 2019 Kia Optima purchased brand new. Kia released a service bulletin on 3/1/22 citing “excessive oil consumption for 2011-2021 Optima's”. I took it in for the "updates" for said service bulletin for the engine and was told that my engine is good and covered now for the life of the engine even past the 100k miles (mind you no one mentioned doing an excessive oil consumption test at this time). On 3/22/24 car had 104k miles on it and the oil light came on. I had an oil change just 2500 miles or so prior. Pulled into an autozone and it was almost bone dry. I put oil in it and the light went off. I took it to Evans Kia and was told that they couldn't do anything because it was past 100k warranty and that they couldn't run the DX test to determine if it was excessively consuming oil as per the recall. Apparently during the recall they did the DX tests if the consumer stated it was burning oil fast or something to that extent. Mine did not get said test, only the upgrade. They should have done the test, but they just did an "upgrade" which clearly did not work. They said since I had the "upgrade", if the engine fails, then Kia would fix it under warranty. Since then, this happened at least 4 more times with the oil light coming on and engine oil practically gone. Each time took less and less miles. I showed up to Kia 2 of those times in 2024 to show them the the oil change date, mileage, and check oil light on. Also physically showed them the oil being almost empty, yet they did nothing but say when the engine dies or "knocks" they can fix it under warranty. One of those times I had it towed but they determined it was the fuel pump, never mentioned anything else. Fast forward 3/15/25 the engine starts knocking and engine light comes on. I managed to drive it to Evans Kia without any accidents. After my car sat for 9 days, they call me on 3/25/25 and tell me there is a "burnt valve on cylinder 4 and the engine will need to be replaced and it is not covered. How? Help!