If you abuse an engine consistently, you are lucky to get 70,000 miles.
Not with a Hyundai. I changed the oil every 5000 miles like clockwork. I used full synthetic and did everything by the book. The Theta II engine has a design flaw that a whistleblower pointed out in 2015 or so. The ignored and voila, problems. Something about ports for oil too small and getting clogged but that was just assumed. I didn’t stick with them long enough to keep researching.
However, when the car drove it was quiet, comfortable and quick.
I "abuse" my engines from day 1.
Red line the things on the test drive.
One Saturn, driven that way got 479,000 miles before it was wrecked.
The engine was still fine, getting 2 MPG better than it "should have".
25,000 miles oil changes, which is NOT abusing them, with Amsoil Signature Series.
This. Have a brother that once had a company rental car - they wouldn’t upgrade or replace it until it failed, so he never had the oil changed or even topped off. Ran for four years on that sludge until he moved to new job - I think it hated him.
KIA engines are defective. On 4 cyl Sorentos they have a problem with excessive cylinder wear, starting from the 3rd cylinder. There are conflicting opinions why. Some say oil channels are poor, others blame cooling system.