Cummins or Caterpillar ?

Cat is no longer building diesels for over the road vehicles. So anything relatively new will have a cummins or navistar. I'm not aware of any others for full size units. Oh, I guess there might be a few duramaxes in top-hat type rigs.

I have only heard thru forums that the cummins is easier to service, but I have no experience with either. My Dad had a cat in a early alpha seeya but we never worked on it and he passed over ten years ago.