jus2shy wrote:
...
Yep, hence why I wish we could just live with a DPF and SCR system and toss out EGR. But it's still necessary with current technologies. Any word on how much idling is on that EGR? However, EGR usage is greatly reduced. Pre-EGR RAMs required EGR servicing at 67,500 miles. Now it's not even in the manual anymore.
I dunno. My 2005 Passat TDI used EGR+catalytic converter and, yes, maybe you cleaned the EGR valve once in a while (by hand or WOT), but otherwise it's been trouble-free. Even though soot gets in the oil, it still has 10K mile oil change interval and is still going strong.
On the other hand, I've heard about lots of troubles with the newer DEF and particulate filter systems requiring frequent regens. A lot of folks are just deleting them because of it. It does seem that Cummins has it down better than the other two though. Maybe in a few years those systems will be more trouble free, but they sure are a lot more complicated than the EGR+catalytic converter. Of course they are a lot cleaner too.