If the truths of the universe were all written on engine parts, we'd be a lot better off than we are now. Sadly, although our replacement engines each came with a now-barely-visible "Run Good" inscription on the valve cover, it feels like we're running backwards.
We started with a car that actually did run pretty well (engine 1), we spent a little time with a car that ran but had bad rings (engine 2), and now we've got a car that doesn't run at all (engine 3). With each new twist and turn, the car's name ("Saab Story") has become an increasingly-accurate description of the state of affairs.
See here for the somewhat depressing details:
http://www.saabtechtalk.com/forum/index.php?topic=1644.0