Is 150k really all that's expected out of a vehicle? I have to say, I'm a bit surprised. Of the many many vehicles I've owned, I have to say the majority of them were somewhere between slightly over and massively over that milestone. Sure, they were "tired" in the literal sense, as in worn interiors... blown struts... electrical accessories that had given up the ghost. However, they all ran just fine. Just off the top of my head:
'99 Corolla: 245k miles, drank oil like a sailor drinks whiskey on shore leave but it was rock solid reliable. Coldest AC I've ever experienced.
'01 Grand Cherokee: 256k miles and rode like a Cadillac. Perfect? Far from it. But utterly reliable.
'07 Impala: 200k miles and the most grief it ever gave was the constant failure of HVAC actuators and a seized AC compressor at 180k. $35 from the recycler and it was back to blowing ice cold.
'96 Aurora: picked up somewhere around 150k and put at least 30k more on it. Keep in mind, it's a Northstar we're talking about here. If I remember right, all I had to do to that car was rear shocks and a wheel bearing.
'91 Buick Regal: purchased around 140k, again put something like 30k on it with very minimal work. Water pump, one bearing, a set of brakes. All basic maintenance.
Current '14 Chrysler 200 flip I'm driving: 153k miles and it's mostly fine. Sure, it needs a condenser and a few odds and ends, however it's 99% solid and runs like a bat out of you know what.
I'm of the opinion that any vehicle can easily last 200k with minimal generic maintenance and care. Look at my old lady's '08 Aveo. 175k miles and other than the things you would expect... aka brakes, a control arm, clutch and water pump, it's been just fine. Talk about a car that was never designed to last that's pretty impressive IMO.