[oil pan 4]

Originally Posted by cRiPpLe_rOoStEr

That's really a bad effect from the DPF trend. Well, maybe if the DPF could retain more exhaust heat (possibly with an insulated coating on the outside and its core made out of some composite with a higher thermal conductibility), and getting its regen independent from the main injection cycles as already happens in some engines such as the Duramax and the current-generation Powerstroke, the oil contamination and DPF damage issues would be less frequent. Getting rid of the EGR is also better for the reasons already pointed out, such as the heat rejection thru the exhaust instead of the cooling circuit, and due to the absence of a direct interference into the combustion process it would allow a more accurate control of injection timing, which is also beneficial to decrease both NOx and fuel consumption, thus also requiring a lesser amount of DEF aftertreatment.

The problem is some times our government thinks every idea is a good idea even when said ideas interfere with each other or counteract each others effect.
Ether that or they want diesel fuel users to buy more gallons of fuel taxed at a rate of around 50 cents or more per gallon.