DPF (diesel particle filter, soot filter, kübemefilter) filter additive helps keep the filter clean and significantly improves the filters permeability. Helps the car burn the filter clean even on short city trips and in cars that are driven very calmly. Do not dose cars that already have a similar substance doser from the factory. Also, do not use with Liqui Moly additive "Smoke Stop Li5180"

Beneficial properties of Liqui Moly fuel additives see here