ahm...wait a minute.... I count 30 times a diesel failed and just read the book to early 1940. And at this time there maybe only 50-80 Subs was on regular patrols....
Anyway surely all combustion engines improoves alot until today and a compare with a modern truck engine is unfair...
I only think a diesel with low rpm and a good hp/volume ratio normaly should last longer...
Some of you remember the (europe) Ford RS turbo? 1.6 litres engine and sqeeze out over 170hp....This baby blows up all the time... I got 2 new engines in first year and after warranty I quick sell it...
Andreas