repower revisit

[belfert]

We can thank the EPA and CARB for the short life cycles of today's diesel engines.  When you have to meet new pollution standards every three to four years it requires a lot of innovation and redesign to meet those standards.  Pretty soon diesels won't be able to exhaust anything but pure oxygen and nitrogen the way things are going.

[TomC]

Actually the new DD15 and DD16 have the longest estimate of longevity at 1.2 million miles.  Not only are they duplicating the great fuel mileage the Series 60's got before 1998, they are running so clean that for over the road applications, the recommended oil change interval is 50,000 miles!  Even for regional use and short haul, a 35,000 mile oil change is recommended.  Compare that to my 3406B Caterpillar that I change at 12,000 mile intervals.
Plus using a Davco 482 (specific model for the DD engines) fuel/water separator, the engine fuel filter change is boosted to every 100,000 miles.  The initial valve adjust is at 100,000 miles then every 500,000 miles there after.
Yes we can thank CARB, AQMD, EPA for these new clean engine rules, but we also have the best running Diesels ever!  Good Luck, TomC

[belfert]

Actually the new DD15 and DD16 have the longest estimate of longevity at 1.2 million miles.  Not only are they duplicating the great fuel mileage the Series 60's got before 1998, they are running so clean that for over the road applications, the recommended oil change

My post was not about the lifecyles of the actual engine.  I was referring to the lifecycle of the engine design.  Ford has gone from the 7.3 to the 6.0 to the 6.4 to the 6.7 mostly due to the emissions issues.  We don't really know if the 6.4 could have met 2010 emissions with changes.  Ford decided to cut Navistar out of the loop on the 6.7.

Ever tighter emissions standards mean engine designs don't stick around as long as in the past.  The Series 60 had a pretty good life, but it is was replaced by the DD15 when emissions standards tightened.  It may be that the emissions change was simply a good time for a new engine rollout for Detroit.