Welcome Dirk-Diggler, I am called Scooter (long story) & this is a great place for sure... learned many things here from some fine folks.
Diesels: I love them too... all my friends have them & they have HIGH miles. All our vechiles are gas right now however.
Here is my high milage vechile winner that gave almost no problems (I may get teased or called GAY on this) it was a 89' 525 BMW 6cycl. w/ 245,000 miles. I sold 5 years ago & it ran/looked/drove great... good car. Only had to replace an excessivley expense fuel pump once.