NHTSA Complaint #11711157 — 2016 HYUNDAI TUCSON

There is a major problem with certain year Hyundai vehicles from 2016-2021 with the engine burning oil and clogging up the exhaust. My moms vehicle has been at dealership for evaluation and combustion cleaning multiple times and the problem still continues. There has been times where she is driving car and it starts to bog down and loose power which is a safety issue especially if on highway. The vehicle is burning oil, occasionally have to add oil. The engine light does come on at times. The car has been at dealership for recommended oil consumption test at every 1000 miles and has not passed. Combustion cleaning done each time and sent on way. Called and made complaint with Hyundai corporate and and got no where. The tech department at Hyundai factory gave dealership recommendations to do which were completed and still having same issue. The factory was only willing to cover 70% off the cost of new catalytic convertor and my mom to be responsible for remaining balance. Hyundai claimed that the convertor was out of warranty 8 years/80,000 miles even though this has been going on for past 2 years. This is not a problem caused by consumer but an issue with factory. Hyundai not living up to there 10 year/100,000 mile warranty as they advertise. There are facebook groups with people having same problems as we are with dealership not really doing anything other than combustion cleaning as advised by factory and corporate not doing anything either. I believe this is a major safety/defect issue with engines in these Hyundai Vehicles . What happens when someone is on the highway and the vehicle bogs down and another vehicle comes from behind and slams into you?