What is the primary goal of using low ash content oil for catalyzed DPFs?

Using low ash content oil for catalyzed diesel particulate filters (DPFs) primarily aims to reduce ash accumulation within the filter. Over time, engine oil naturally contains various additives, including metallic compounds, which contribute to the ash content. When these oils are used in engines equipped with DPFs, combustion processes can lead to the formation of ash deposits that accumulate in the filter.

These ash deposits can hinder the filter's performance by obstructing the flow of exhaust gases and reducing its effectiveness in trapping particulate matter. By utilizing low ash content oil, the amount of ash generated during engine operation is minimized, which helps in maintaining the clean operating condition of the DPF. This ultimately leads to longer intervals between filter regeneration cycles and extends the overall lifespan of the DPF, ensuring that the emissions from the engine are kept within regulatory standards.

Therefore, the primary goal of using low ash content oil is to manage ash buildup effectively, facilitating the reliable operation of the DPF and thereby promoting better emissions control.