JLM Diesel DPF Refill Kit for J02265JLM DPF Refill Kit: Efficient Solution for Diesel Particulate Filter Maintenance Modern diesel vehicles come equipped with a diesel particulate filter (DPF) to capture soot from the engine, preventing it from entering the environment. Over time, the DPF becomes full and requires regeneration, a process in which the soot is burned off, often during high speed driving. To improve regeneration efficiency, some manufacturers use a regeneration fluid