My 1995 Ranger has 385000 miles on it. What more is there to say? 385000 miles.
I don't do much to maintain it, either. I probably change the oil about every 10000 miles. It probably hasn't had a tuneup in 200000 miles.
I expect that the drivetrain would keep going to a million miles. The only issues I've had in the past few years have been suspension: rear leaf-spring brackets rusted away and replaced; front sway-bar link broke.