Not mega miles but:
Mk1 Focus 1.8 petrol 155k retired due to sump issues. Abused from 6 months old by myself.
Vectra 1.8 petrol 163k retired with only Cat converter MOT fail. I was running it as a second car and I didn’t need it anymore. It was a freebe from my Dad who was offer £300 as a trade in at 117k. I think in 47k miles after that it only needed a new battery and a minor suspension repair.
Mondeo 2.2 tdci 169k, written off by a tourist, it was still running good.
I am currently on a sprightly SAAB at 128k so I wonder how it will fair.
When I was a student I worked as a delivery driver and drove several vans with 300k + that still went fine. Mercedes and Toyota’s mainly.