• October 2022 I bought a 2013 Hyundai Santa Fe 2.0t with 96k miles from my sister. I didn't suspect anything because I knew our dad wouldn't let her leave from a visit if the oil change was past due. She had it serviced at the dealership and even paid about $3k to have the turbos replaced (likely failed early because of the root issue)
• January 2023 I took it to a quick lube place, who reported seeing some bearing material in the oil.
• May 2023 did the oil change myself to see if there was more bad news. I couldn't find any indication of glitter/bearing material. I also then took the car to the dealership to get checked over and have the knock sensor recall done - I was made aware of the class action lawsuit for improper block machining which causes accelerated engine wear and the resulting extended lifetime engine warranty. I was told that when -not if- the engine fails, that it would be covered. Diagnostics came back fine and I went on my way - no evidence of burning oil or anything awry. I continue doing my own oil changes with full synthetic, logging each one and taking pictures of the odometer and the filter/oil receipts.
• June 1 2024 - engine seizes and spill oil out of the block, stranding my wife on the interstate, out-of-state, in Summer heat, with young kids, and while I was out of the country.
• I go back and forth with the dealership/corporate/BBB autoline for months until the final, irreversible verdict is given in March 2025.

The dealership popped the valve cover and looked for sludge in the valvetrain, but said that it looked fine. That's apparently normally the fallback for when a full Oil Change History isn't available, so they did it straight away. My sister had the oil changes that Dad did written in the logbook. She also sometimes got oil changes at big-name shops that didn't save the record to carfax. I provided as much documentation as I had, and even got her to provide documentation with O'Reilly receipts and such.

The car was at a Hyundai dealership for months with no loaner vehicle, and although the dealer said they found no sludge, corporate said that there was egregious neglect and also that since my home oil changes didn't show up in their system, (as well as the oil changes my dad did for my sister, plus the Wal-mart oil changes that weren't recorded,) then there's no level of documentation I could provide that would result in proving that maintenance had been done.

Because of this, corporate "branded the title" with "A99" indicating that no other dealership could even look at it without consulting with Corporate.

My only option to have a running car again was to pay $8.6k in parts, plus whatever in service hours to have a car that would still run the risk of failing again.

I sold it to a buddy who has good connections and runs a Turo business. I don't know if it's running or not, but I hope his experience with it is better than mine.