Diesel Particulate Filters were first implemented on trucks in 2007 and they are the essence of clean diesel technology. They help burn off most of the hydrocarbons found in diesel emissions and protect the environment.
With time, ash and soot builds up in the filter and leads to replacing or, the best solution: proper cleaning services. If the DPF is well taken care of, it will last even hundreds of thousands of miles. However, if it is omitted, it could lead towards poor fuel economy.