what year did EGRS , DPF's, DEF etc..show up on DP's

The "serious" stuff started with the 2007 EPA and was changed again in 2010. Most everyone used DEF to meet the 2010 standards. Actually, the 2010 engines get better mileage because they can build them looser.

My 2012 Phaeton gets better mileage than my 2003 DP got, even though it weighs about 7000 pounds more.

Txsurfer wrote:
In other words when were the last good non-emission diesel DPs made. I have a 2008 RAM 6.7 with it and I believe it was the first year so I assume a similar time frame for DPs?

As far as I know Cummins is 2006 and earlier;; non electronic was late 1997 and earlier

1967 started the Big Downhill Slide, if that's what you want to call it.

Diesels started needing DPFs and DEF with the 2007 MY. Hardly any of that year exist because there was no ultra low sulfur diesel fuel available, needed for both technologies. Both EGRs and crankcase vented to the intake were used long before that -- both my 2001 and 2005 diesels had both.