Hyundai Tucson oil consumption problems

Filed Nov 6, 2026 · Engine · IL

COMPONENT FAILED: Engine / Powertrain assembly suffering from severe, documented manufacturing internal oil consumption. Available for inspection upon request. SAFETY RISK: My safety was severely put at risk by Napleton Hyundai (2600 Michigan Ave). On XXXX, Service Manager Heliose explicitly instructed me to deliberately drive the vehicle with known severe fluid loss until the engine completely "locked up" and seized on the road so Hyundai would replace it under warranty (Campaign TXXM). Advising a consumer to drive a vehicle until catastrophic engine seizure occurs at high speeds on public highways creates an extreme hazard—risking sudden stalling, loss of control, and major collisions. Furthermore, the dealer falsified a "goodwill" oil test by completely omitting mandatory tamper-evident safety seals on the dipstick and cap, releasing an unverified, unsafe vehicle into traffic. CONFIRMATION/INSPECTION: Severe oil burning was confirmed by Valvoline on XXX, where a fresh oil change ran completely dry within weeks with no external leaks. Napleton Hyundai acknowledged the engine warranty extensions (T6G, TXXM, DTC P132600) on XXX, but held the test hostage behind an unauthorized $1,400 chemical cleaning fee. The car has not been inspected by police or insurance as a crash has been avoided through manual monitoring. The service intake person ([XXX]) put on my invoice oil consumption check. I checked my engine to see if they placed any (Tamper-Evident Sealing) and the technician did not apply security seals, tape, or paint marks to the oil filler cap, dipstick, and drain plug! They fix this so they would not be responsible for my car engine WARNING SYMPTOMS/TIMELINE: Rapid internal oil depletion causing the engine to run dry within a 30-day window. Symptoms started after a routine oil change on XXX. No dashboard warning lamps are active, making the sudden dry engine an invisible, highly dangerous mechanical hazard. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 4, 2026 · Engine, Fuel system · FL

While driving down the highway, the check engine light started to flash. Once the car was turned off and back on again, it shook violently. It was hard to keep it in the lane and I was worried it would cause an accident. It was driven off the highway while constantly shaking. Once it sat off for roughly 30 minutes, it would turn on, but wouldn't turn over and drive. It was towed to a dealership where it was diagnosed, though I was never given anything past a verbal "it stopped compressing". It turns on and over, but makes a grinding noise. It will die and turn off the engine after roughly 45 minutes. This had never happened before. *I've been told a few different things by people who hear about the problem, but I've never received a real diagnosis by the Hyundai dealership it is located at. It has always had a oil consumption problem, adding roughly one quart of oil every 800-1000 miles. It has had oil changes every 5,000 miles. It also had a hard time when cold-started accelerating, but would work fine once heated up. It is available for inspection upon request.

Filed Oct 15, 2026 · Engine · NY

Excessive oil consumption. Mileage is 116.7K miles. Over 4 quarts used in approximately 3,500 miles. Car went into "limp" mode with no power. Top speed on level ground was 45 mph, on a hill 25 mph. Had to pull over to the side of the road so that other cars could pass. Drove to mechanic who saw about 1 quart remained in the car. Oil light didn't go on. Service engine light flashed when the car went into "limp" mode.

Filed Oct 13, 2026 · Acceleration, Engine · LA

While driving at highway speeds, my 2019 Hyundai Tucson SE suddenly loses acceleration and drops into a 30 mph 'limp mode' while the engine overheats. This creates an immediate highway safety hazard with an imminent risk of a rear-end collision. The vehicle also suffers from excessive oil consumption, requiring manual top-offs twice a week. The servicing dealership diagnosed a fuel system failure, quoting $5,847 to replace the fuel pump, fuel injectors, and oil gasket. Hyundai Corporate (Case #43358088) officially denied warranty coverage on October 12, 2026, falsely claiming wear and tear despite active TXXM 150,000-mile extended warranty framework protections. Furthermore, there is a data discrepancy: the dealership pulled diagnostic trouble code P0172, but corporate claims the vehicle threw code P0173 and is withholding the physical diagnostic printout behind a fee paywall.

Filed Oct 7, 2026 · Engine, Fuel system · PA

I have had 2 catalytic converters the original and a 2nd one. Now I need a 3rd due to excessive oil consumption. Corporate did a good will for a combustion cleaning and that did nothing. The dealership checked my oil and said there was excessive oil consumption and submitted for an engine replacement and it was rejected. Absolutely ridiculous.

Filed Oct 7, 2026 · Engine, Fuel system · NH

The new 2019 Hyundai Tucson equipped with the Nu2.0L GDI engine, I purchased in 1/2020 as the original owner to this day has been diagnosed with a burnt exhaust valve due to heavy oil consumption that has been an uncorrected documented manufacturer’s defect within Hyundai motor corporation. The excessive engine oil consumption has poisoned and destroyed the first catalytic converter, has fouled the combustion chamber which has consequently choked and burnt the exhaust valve with the excess oil ash and carbon buildup. The car was approved for a second catalytic converter install last week which my car currently sits at 125,000 miles and the dealership through the authority of approval with Hyundai motor America has replaced under warranty however subsequently running the excess consumption test, the car now has a burnt exhaust valve which Hyundai motor America is extending a “good faith” proposal which they are willing to replace 60% of the burnt valve and I’m responsible for the 40% even though I have complied fully with the dealership’s recommended preventive maintenance schedule which has been solely performed at the same dealership since the day I bought the car and drove off the lot up until the 100K mile warranty. And now discovering my particular motor has been extended to the 15/150,000 warranty due to the lawsuit settlement. I have continued with my diligence with keeping up with the oil, instead of ignoring the issue that the car burns excessive oil to potentially has the engine fail while driving to be fully covered on the rod bearing failure settlement. Help in my concerns would be greatly appreciated through the federal safety agency.

Filed Sep 25, 2026 · Engine · CA

On XXX, while driving at freeway speed in [XXX] with my [XXX] son in the back seat, the engine of my 2020 Hyundai Tucson (2.4L Theta II GDI, approx. 99,108 miles) seized suddenly and without warning. I lost all motive power in moving traffic and coasted to the shoulder, where my son and I sat stranded for 30 minutes with smoke and a burning smell coming from the engine while waiting for a tow. No warning lamps or messages appeared before the failure. COMPONENT FAILED: Engine. Tustin Hyundai ([XXX]) diagnosed the failure on RO XXX: engine seized; connecting rod pierced through the bottom of the engine block due to internal catastrophic failure at the crankshaft/bearings; starter had a burnt smell. The dealer recommends full long block replacement. The vehicle remains at Tustin Hyundai and is available for inspection upon request. CONFIRMED BY: Hyundai dealership technician (diagnosis on RO XXX) and an insurance adjuster (National General/Allstate claim XXX, Estimate of Record on file). A goodwill request was submitted to Hyundai Motor America and denied. RELEVANT DEFECT HISTORY: This is the same connecting rod bearing failure mode for which Hyundai extended a Limited Lifetime Warranty on 2018-2019 Tucson vehicles with the same Theta II 2.4L GDI engine (TSB 22-EM-001H-1/TXXI). Hyundai Service Campaign 9C2 (Theta II ECU software update, issued XXX) was open and incomplete on my VIN at the time of failure and was performed only at the post-failure service visit. Oil consumption without external leaks, a documented characteristic of this engine defect, was present before the failure. SAFETY RISK: Sudden total loss of motive power at highway speed in traffic with a child aboard created a serious risk of collision, and the 30-minute roadside wait exposed us to passing traffic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 18, 2026 · Engine, Fuel system · NJ

Engine has defect that causes oil to heat at an unusual levels there for damaging other vehicle components such as The exhaust system parts clogging up and Triggering check engine warning lights for emissions.

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.