What type of oil is required for catalyzed DPFs?

For catalyzed Diesel Particulate Filters (DPFs), oils with low ash content are crucial. The low ash content is essential because high levels of ash can accumulate in the filter, leading to increased backpressure, reduced efficiency, and ultimately, potential damage to the DPF system.

DPFs are designed to capture and store exhaust soot in order to reduce emissions from diesel engines. When using oils with low ash content, the amount of particulate matter that enters the DPF is minimized. This is particularly important for newer diesel engines equipped with after-treatment systems, as they often have stricter regulations regarding emissions.

Using high, medium, or no ash content oils could lead to performance issues. High ash oils may lead to excessive buildup and frequent regenerations, whereas oils with no ash are impractical for use in diesel engines that require additives for wear protection and engine longevity. Thus, low ash content oil strikes a balance, ensuring proper engine function while maintaining the integrity and efficiency of the catalyst within the DPF.