Not a Hyundai but a Ford anectote. Son bought a new 2020 Explorer. Got the Ford extended warranty which added about another three years to the factory one. His engine needed new cam phasers and a few other bits. It was a very $$ engine out repair. Ford was very good about covering almost everything. Car has almost 100K now and has been uber reliable since. He could document all the oil services were done at the local Valvoline quick lube shop.