2019 Hyundai Tucson: excessive oil consumption

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 Jul 17, 2026 · Engine · CA

I have noticed that the engine oil level in my vehicle drops significantly between regular oil changes. Despite adhering to the manufacturer's recommended maintenance schedule, I frequently have to add a quart of oil after driving only about [800~1,000 마일] miles.I understand that this is a widely reported issue with Hyundai Owners Forum affecting 2019 models. Many experts and fellow owners have identified that this rapid oil loss is often caused by manufacturing defects, such as faulty piston rings, which can eventually lead to catastrophic engine failure.As a Hyundai owner, I am highly concerned about the safety, reliability, and decreased resale value of my vehicle. Running low on oil without warning creates a high risk of sudden engine breakdown while driving on the highway.I kindly request that Hyundai Corporate or my local authorized dealer investigate and resolve this matter. Specifically, I am asking for:An official engine inspection and a proper Oil Consumption Test.Necessary repairs or a full engine replacement under the applicable powertrain warranty at no cost to me.

Filed May 29, 2026 · Engine, Transmission · IA

While driving, the check engine light began flashing and the vehicle shook severely due to engine misfiring. The vehicle has had a recurring cylinder 3 misfire throughout ownership. Spark plugs and ignition coils were first replaced around 40,000 miles and replaced again in December 2025 for the same recurring issue. A Hyundai dealership inspected the vehicle and found codes P0300 random misfire and P0303 cylinder 3 misfire. The dealership technician documented that the piston rings did not look good and confirmed the catalytic converter was damaged as a result of the misfires. The vehicle has had an engine rattle at idle, oil consumption, and blow-by since early in ownership. The engine defect is progressive and predates the current mileage. The flashing check engine light and severe shaking while driving at highway speeds created an unsafe condition with other vehicles on the road. The problem has been confirmed by a Hyundai dealership. Hyundai Motor America was contacted and denied goodwill warranty assistance. The vehicle is available for inspection upon request.

Filed Apr 28, 2026 · Engine · PA

Oil consumption is at an all time high. At last oil change I had Milage 71847 on 3/8/26. I checked my oil on 4/26/26 with 73182 miles, oil was at the add mark on the dipstick which means 2 quarts was gone from my engine at about 1500 miles put on my car since the oil change. Upon reading up on this issue, it is a wide spread issue with several Hyundai models. I bought it used at a car dealship when it was only a year old, so the warranty is only for the original owner. I still owe $3400.00 on this car and I am afraid the engine will go before it is paid off.

Filed Apr 16, 2026 · Engine · 59,000 miles · NY

The contact owns a 2019 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the vehicle unexpectedly stalled and was idling roughly. The message “Stop Driving” was displayed. The contact stated that the vehicle failed to accelerate and lost automotive power. The failure had occurred several times. On one occasion, the vehicle had to be towed. The vehicle was able to restart after several failures. The vehicle was taken to the dealer, where it was diagnosed with engine failure due to excessive oil consumption. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 59,000.

Filed Feb 24, 2026 · Engine · NY

The engine consumes oil and requires catalytic converter replacement every year at inspection. The engine has been maintained with regular oil and filter changes and the oil is continuously needing to be topped off between changes. I have owned the vehicle for 5 years and have replaced the catalytic converter 3 times. The first time I had it replaced it was still under warranty and it was replaced by the dealership. The technician stated that it was a known issue with these vehicles. It was about six months before the check engine light was on again and showing the same code and problem. Every year I am replacing the catalytic converter to pass inspection. I have taken it to different locations every year to try to find a solution to this and they all say the engines are burning too much oil and causing catalytic converter failure.

Filed Feb 24, 2026 · Engine, Fuel system · IL

Catalytic converter and oil leak which is causing the vehicle to lose power. The catalytic converter was replaced in 2024 and now is bad again in 2025. Oil consumption has been a problem since 2024. Hyuandi is refusing to repair the vehicle. Despite the engine making a knocking noise and the check engine light is flashing the vehicle is still under the 150,000 power train warranty

Filed Jan 15, 2026 · Driver assistance · FL

My 2019 Hyundai Tuscan has been burning oil and the oil has to be topped off every 1,000 miles or so. There are multiple check engine lights illuminated: abs, front collision, traction. These lights have flashed off and on for 3 years but are not light up solid. This sounds like an issue.

Filed Jan 12, 2026 · Engine · TN

Car is burning oil quickly. Had 2 oil changes within 3 months. Way before it was needed. No oil leaks detected. Oil gets dark fast and is burning off quickly. Take to Pep Boyz and other repair shops. Not yet taken to dealership.

Filed Dec 25, 2025 · Engine · KY

Hello, my 2019 Hyundai Tuscan I have owned for 3 years-4 years. Unfortunately it is a GDI Motor, it uses oil so bad, even though I do change the oil every 3,000 miles, and do every maintenance on the vehicle that is told to me done, ever time I change the oil it is low, even though I top it off through out the 3,000 miles. I have no leaks at all and it is just evaporating, I do not think this is right for a 2019… there is several issues and concerns from other buyers with this issue. There should be a fix to this, asap