2018 Hyundai Tucson: excessive oil consumption

Filed Sep 2, 2026 · Engine · TX

I own a Hyundai Tucson 2018 SEL Plus. My problem is my vehicle is coming to the end of it's 100,000 mile warranty. This vehicle started burning oil about 30,000 miles and it got worse. I checked on recalls and there was no recalls for my VIN number for this vehicle. My Hyundai vehicle is burning a quart of oil every 300 miles and this is no exaggeration. I bought the car brand new and had to replace my 1st Catalytic converter at 79,627 miles on 5/14/25 that was originally on the car. The second Catalytic converter that I had put on I, had to replace that Catalytic converter again at my cost at approximately $900.00 and then after that it plugged up again at 91,928 miles on 7/28/26 and I, had to replace that one that is the third one now. The Catalytic converter company had warranted the work and the converter to be installed. This has caused the car to not only misfire, but become a possible road hazard to miss enough and possibly cause it to stall or reduce the power output of the vehicle while in operation and on public roads in traffic and possibly create a major accident on the freeway. This is a major saftey concern being that you could not only lose power while in motion but could lock up the engine. We talked to mechanics, other people that own them and even the service guys at Hyundai knew it is problem. The service genteman said that they would clean the valves I, believe they talked about cleaning the valves with walnuts like sand blasting and I, told him cleaning the valves is not going to do anything for the oil consumption, because the oil consumption is the engine.The engine when it was originally made on the number 3 cyclinder was bored wrong. That is our problem because the oil rings and rings are letting the oil bypass the piston and filing out the iriadium spark plug and our car mileage has gone down because of this the rings are wearing faster and causing us to keep buying newer spark plugs. " Check Engine Light Flashes " plugged Cat Converter.

Filed Aug 29, 2026 · Engine · IN

My engine is consuming an excessive amount of oil due to a known issue with the Hyundai engine design impacting cars from 2011-2018. My car only had approximately 89,900 miles on it when I noticed the issues. Hyundai is aware of the defect and has re-engineered their engines due to the issue. The engine is available for inspection upon request. My safety and the safety of others is put at risk every time I drive. By denying my claim, I am forced to repeatedly top off my oil to maintain levels and try to drive as safely as possible, however my car is at risk of engine failure due to the consumption. I have escalated these concerns to Hyundai and I was still denied. The problem was confirmed by a Hyundai dealer. The denial stems from Hyundai’s policy that it must be consuming greater than 1 quart for every 1,000 miles driven. However, my car is still consuming oil and it is incredibly unsafe. The engine was inspected by qualified Hyundai mechanics. The consumption issue was documented in their paperwork. The oil light would intermittently flicker while I drove, which had never happen before. Additionally, the car began to drive rough and I recognized something was likely wrong with the car. Unwilling to take any safety risks, I immediately scheduled an appointment with the dealership to determine the issue.

Filed Aug 17, 2026 · Engine · MA

My 2018 Hyundai Tucson with the 2.0L engine has suffered catastrophic engine failure. The engine lost compression in cylinder 4 and now requires a full replacement . This is part of a broader pattern—the 2016–2018 Tucson is known for excessive oil consumption that leads to engine failure, with over 1,900 engine-related complaints filed with the federal safety agency across these model years . Prior to this failure, I reported excessive oil consumption and other engine issues to my dealership. Despite these reports, the problem was not resolved, and I was given inadequate guidance on how to address it. The engine ultimately failed while I was driving, creating a sudden loss of power that posed a safety risk. Other Hyundai Tucson vehicles with the same engine have been covered by recalls for related engine defects , but my specific VIN was not included, despite exhibiting identical symptoms. Meanwhile, other owners report that similar engine failures have been dismissed or denied coverage by Hyundai . This inconsistency in how the manufacturer handles a known, widespread defect is what prompted me to file this complaint.

Filed Jul 25, 2026 · Engine · UT

The engine has been consuming oil, where we were adding at least a quart of oil between oil changes. We noticed the vehicle would shake like it was going to die while idling at a stop light or in a drive through. Recently my husband was driving home from work on a busy highway and the vehicles check engine light started blinking on and off. He pulled over and had the vehicle towed. The oil consumption made the vehicle throw a rod and damage the engine. Now we are needing to replace the engine.

Filed Jun 19, 2026 · Engine · MN

-Very high oil consumption. Going through a little over a quart very 900-1000 miles. Has a GDI turbo engine. -Transmission issues. Has a dual clutch transmission that slips.

Filed Apr 27, 2026 · Engine · AL

This complaint involves a catastrophic engine failure in a 2018 Hyundai Tucson that appears to be part of a broader pattern of similar failures reported by other owners. Prior to failure, the vehicle exhibited excessive oil consumption and progressive engine performance issues. These symptoms have been widely reported by other consumers with the same vehicle, suggesting a systemic defect rather than an isolated incident. The engine failed completely while the vehicle was being driven to a mechanic for evaluation. The vehicle experienced sudden loss of power and shut down in the middle of an active intersection, creating a significant safety hazard and risk of collision or fatality. Online consumer reports, forums, and complaints indicate that many 2018 Hyundai Tucson vehicles experience similar symptoms—specifically excessive oil consumption followed by engine failure. Despite this apparent pattern, no comprehensive recall or sufficient consumer warning has been issued. The manufacturer has refused to provide assistance, citing warranty limitations, which raises concerns that known defects are not being addressed and unsafe vehicles remain in operation. This issue presents a serious safety risk due to sudden and unexpected loss of engine power while driving. I am requesting that the federal safety agency evaluate this as a potential widespread defect and initiate a formal investigation that could lead to a recall to protect consumers

Filed Mar 29, 2026 · Engine · CA

The oil consumption issue has begun. At about 75k miles, my 2018 Hyundai Tucson 1.6L Turbo is burning oil at an insane rate. And there is no indicator of it occurring (no codes or anything on the dash) until it's too late. Hyundai is now WELL KNOWN, and aware, for this problem and it is a catastrophic safety issue because of the possibility of the engine seizing and disabling the vehicle. It isn't negligence on the consumers part either, especially when timely and consistent oil changes are being done. *NOTE* My vehicle has had the transmission (6 speed dual clutch) replaced at around 30k miles and is having the same issue again (at 75k miles). So first the transmission and now the engine!

Filed Feb 5, 2026 · Engine · PA

Purchased 9/5/25 at 76,280 and oil change light shown by 10/1/25 when i received an oil change at Valvoline and was told of my engine issues at 77,733 miles. Car then looked at by Elizabeth Auto Sales [XXX] and confirmed oil consumption at no fault of my own and metal shavings in oil. Car then towed to #1 Cochran Hyundai Monroeville [XXX] and looked at by Dale. Oil change and oil consumption test started and confirmed of burning more than 1 qt per 1k miles. 2/4/2026 engine test cleaning requested and denied. Car stalls at random times can possible cause an accident. yes the problem was produced to the dealership purchased from which was Kenny Ross Subaru Irwin pa 15642. Yes the problem was confirmed by Hyundai on 11/7/25. Only warning was the oil change light flashing which forced me to get an oil change less than a month of purchasing on 10/1/25 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 14, 2026 · Acceleration, Engine · MN

The engine and engine management system of my 2018 Hyundai Tucson experienced repeated failures resulting in loss of propulsion and unsafe drivability. In November 2025, while traveling approximately 75 mph on a freeway, the vehicle suddenly entered limp mode without any prior warning, causing an abrupt loss of power in active highway traffic. No warning lamps or messages appeared before the failure. After the loss of propulsion occurred, the check engine light, battery light, and oil light illuminated sequentially. Diagnostic trouble codes P1326 and P0326 were recorded. Initial inspection indicated severe oil consumption despite a recent oil change less than 2,000 miles earlier. A Hyundai dealership replaced knock sensors under warranty. Shortly after release (30 miles), the vehicle again exhibited severe drivability issues, including a flashing check engine light, and required immediate towing. A second Hyundai dealership replaced the short engine block under warranty. Approximately 180 miles after the engine replacement, the vehicle again developed unsafe drivability symptoms, including delayed throttle response, failure to accelerate unless the accelerator was fully depressed multiple times, jerking or lugging when slowing or stopped, and a faint whining noise. The check engine light illuminated again. These failures represent repeated loss of propulsion and unsafe operation following manufacturer-approved repairs, including full engine replacement. The vehicle has been out of service for approximately 57 days and remains in the custody of a Hyundai dealership awaiting diagnostics. The vehicle is available for inspection upon request. The sudden and unpredictable loss of power at highway speed created a significant risk of collision and serious injury to the driver and surrounding motorists.

Filed Jan 3, 2026 · Engine · IL

The engine is burning excessive oil. Down 3 quarts over approx. 3,000 miles. Mechanic verified there are no leaks - it is burning the oil.

Filed Dec 30, 2025 · VA

High Oil Consumption

Filed Dec 18, 2025 · Engine · NY

My 2018 Hyundai Tucson has been experiencing oil consumption issues for over a year. It began at around 80k miles, when it should have been covered by warranty but they made me pay out of pocket for an oil consumption test only to ultimately recommend a top end cleaning, which I also paid for and it did not solve the problem. This is a known issue with Hyundai, and they have settled many lawsuits but have consistently denied any repair or solution for me. I am burning about 5 quarts of oil every week, and this is a problem they refuse to help solve.