Use regularlPAIRS WITH DPF PURGE ADDITIVE (SKU 808) — After foam cleaning, maintain results by adding our DPF Purge fuel additive every 3,000 miles. DPF Foam Cleaner — Diesel Particulate Filter & Catalytic Converter Cleaner Spray | No Removal Needed | Cleans Soot & Carbon via O2 Sensor Port | German Technology.
