my dad had a MK1 jetta 1.6 diesel (no turbo) back before i was born, it had 310K on it when he sold it. he said he bounced it around the country something proper, never remembers going too easy on it. changed the oil and filters every 5K, and no matter how he drove it, it always returned 39MPG.
i really really love high milers, its kind of like and old man who face could tell a million tales. i have even been looking to get an old E-class taxi from germany, you know the ones with close to 700,000 kilometeres on them, OH THE THINGS THEY MUST HAVE SEEN!!!