[oil pan 4]

See remove the DPF, EGR and EGR cooler, sell it to some sucker in NY or CA that has to have one and your problems go away.

New Mexico air isn't clean. Its full of dirt.
Mother nature is our main air polluter.
If you have ever smoked and live beyond the age of 65 here you are going to get COPD.

If there is a DPF doing its thing near you it is producing colorless odorless diesel particulate in the 1 to 2 micron range it defeats all your body's senses and defenses. And you unknowingly breath the particulate deeply into your lungs.
The DPF does eliminate most of the diesel particulate but what it does produce is exceptionally bad for you.

With a non emissions controlled diesel the particulate is big, from 20 to 250 micron is what I am hearing. You see it you smell it and react to it you don't breath it in, unless you really like the smell of burned diesel.

You want to know what the scarry thing is, when bad guys are trying to make dry powder type chemical or biological weapons they are trying to get the particulate in the 1 to 2 micron range, any smaller than that and you breath it in and right back out, any larger than 2 microns and your body stops most of it.