My Saab 9-5 was showing 140k miles when I decided to pass it on. Needed steering rack and some other stuff so I sold/gave it to the fellow who looks after our cars, and he passed it on to his postman who needed some wheels. Never serviced, neglected, it was dead with engine failure within two years.
Took a taxi from Pollenca to Palma couple of years back, Toyota Prius. I was immaculate inside and out, looked brand new. A little surprised to see that it was showing over 100,000km on the clock, so got chatting tenth driver about it. He told me, iirc, that the owner/drivers expected to get something like 600,000km out of them without any problems, but that proper maintenance was a must. Regular oil changes, anything that needed adjusting or fixing was done immediately. Slow, easy driving, no racing about, engine at optimum temperature, etc. etc.
I recall reading about some American who used to drive cross country Florida to Washington State weekly in a Honda Civic or something, and had clocked over 1 million miles without any dramas.