2014 Kia Sorenta. Recall on engine completed in November 2017 with oil change at dealership.
Next oil change 3/29/2018 at ~105,000 miles. Follow up brake replacement and ball joint replacement 4/7/2018. Drove ~900 miles of short local commutes (10 miles, round trip for school drop off and drive to work) mostly, no lights or evident problems. No oil leaking on driveway, No smoking. No smells. Took road trip and drove ~600 miles. Going up a mountain pass the car suddenly spikes RPM to 5000+ and loses power. Pull over, no smoke, engine spikes to reading hot. Let car cool and try to go again, moves 10 feet, spikes RPM, so pull over and call tow truck. Towed to nearest car shop where they report there is 1/2 a qt of oil in engine, thick and sludgy (they show it to us, inspecting carefully for any shavings, etc), they fill it, test drive it, run it for a long time, no signs of problems. Mechanic has a hard time believing we really had the oil changes when we report. Leave the shop and make it 17 miles before the engine seizes and the engine is now ruined.
Any ideas where the oil could have gone? Any idea how long the engine could have possibly run if at the oil change they drained and forgot to fill, or drained and only filled part way?