Diesel engine failure?

Raise your hand if you have first hand knowledge. I get all these a friend of a friend or a guy told me or I read somewhere. Been around a lot of diesels both in and out of MH's, Ya there are a few problems with 5.9's of a vintage and a few ISL's and there's always a Cat or two. As far as damage in most modern MD's the motor or trans will protect each other and shut down before major damage, that in itself can cost many dollar to find the cause. But for the number of MH's "That are maintained to spec" there are few problems. How many operators get in and read the manual so one operates the coach correctly. I see so many giving advise on how to operate in certain conditions and they are totally out of manufacturers operating instruction. One I really like is mountain driving and not running up a good grade at best cooling RPM for rear radiator rigs, that is printed for a reason. I would really like to know the failure rate on both gas and diesel rigs maintained and run to what the manufacturer recomends, bet its low with either.

LEN