My dad had a way of coaxing miles out of things. He changed his oil every 2,000 miles, greased all zerks every 3 oil changes, and greased wheel bearings every 6 oil changes. We had a 66 IH Travelall when I was a kid that the speedo broke in after the third time it turned over, it took him about 9 years of driving to get that far, and he drove it for nearly another 10 years after that.
The most I've gotten out of a car was a little over 350,000 out of my ex-wife's 96 Camaro before the trans had to be rebuilt. It ran for another 20,000 or so before we got divorced and I have no clue where it is today.