I'm not sure of the longevity of diesels, I've done some researching around the net.
For example, I did a google search on "used VW golf" and most of the sites were located in "diesel friendly" countries, mainly England and Austrailia and almost all of them post miles driven either well under 100K or slightly above.
AutoTrader, a popular circulation, has a miles driven search filter and I did one for VW, all models, 1981 to present:
http://www.autotrader.com/fyc/search...p;isp=y <br />
I couldn't get the above link to work on this site but it will take you to a page with 3 pictures near the top. Click the "Mileage" link just below the pictures to reach my link.
I found one page of diesels with over 100K miles, cars with under 100K appeared as early as page two.
I also did the same search for Honda with the same search filter:
http://www.autotrader.com/fyc/search...1&isp=y <br />
There are
eleven pages of Honda's with over 100K miles compared to VW's one. The highest VW is a van with 240K miles, the highest Honda is also a van with 576K miles.