When working not long ago, I only had a 1 mile drive to work, so to try to avoid clogging the particulate filter (DPF), I would leave early and make sure the engine reached operating temp. Also made sure to drive it as often as possible at highway speeds to offset the short trips. In spite of all my efforts, I was nearly left on the side of the highway due to the DPF being over-clogged. "Critical" I think was the word that showed up on the dash warning me of the problem. Fortunately a dealer was about 30 miles up the road so I was able to make it there, slowly. (I was losing engine power the whole way). Dealer had to do a manual regen to clean the filter, at a cost of $200.
While diesel tows like nothing else, I have gone back to gas. Tired of the diesel maintenance costs and DPF headaches.