I've owned a good pile of diesels to this point. So far all have had their positive points. But what is the best put together, most long lasting road size small diesel engine ever made?

Cummins 5.9?
the MB OM 617 N/A?
Something from one of the Asians (Mitsubishi, Toyota, Isuzu, etc)?

I met a guy this week who has 1,600,000 on an International Harvester 7.3 Powerstroke powered F-350 Ford truck. He told me that it has been through 27 clutches in that time period but get this................... ONLY ONE engine overhaul!

Just wondering what other people think on quality diesels made.

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-E300d '99 350k
-Suburban '93 220k
-TDI Jetta '03 350k
Sold
-F250 '96 7.3
-Dodge Ram 12V
-E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia MO Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's.