As the intention is to reduce the oxides of nitrogen, manufacturers commonly use either Eolys or Adblue .....they produce the same effect but work in different ways and (as far as I know) you don't mix the systems.But how does the engine know and tell you the oil has been degraded and needs changing? If your car uses EOLYS fluid ,is this avoided?
As they used to say, if you don't ask questions, you never learn....
Oils degraded with diesel need to be changed.....I believe modern trucks use oil analysis gear as shown by SFK. For mere mortals like us, we are on our own as many Ford and Mazda owners may testify.
Oil blenders like Millers will give you an analysis on your oil, for a fee.
John