The only person I've known to have had problems with their Hyundai is someone who could probably destroy a Sherman tank, and has quite an impressive list of vehicles he's managed to kill or wreck in the 45 years he's been on this earth.
The most recent was a 2013 Chevy Impala he bought used. I asked him if he checked the oil, "Yea it's fine". I checked it one day and it wasn't even showing up on the dipstick. I had to add 5 quarts to get it to the full mark (I was trying to help this guy out, but have since come to the conclusion that it's impossible to help someone whose elevator appears to be stuck on the ground floor...). It holds 6 quarts... A few months later and the engine locked up. Shocker.
Prior to the Impala he was car-less so I was letting him drive my 2004 Crown Victoria, which never used any oil when I drove it. I checked it after he had driven it for a month, and it was a quart low. All I can figure is that he was driving it like an animal.
Oh, the Hyundai he had? I think it was his grandmother's, a Santa Fe, and the engine block somehow cracked, or so he says. IF that's true I wonder how long he was driving it with the temp gauge pegged in the red...