The Rislone DPF Clean: Diesel DPF, Exhaust, and Emissions System Cleaner is designed to clean the fuel, exhaust, and emissions system of diesel vehicles in order to restore power and performance, reduce regeneration cycles, extend diesel vehicles particulate filter (DPF) life, save fuel, and turn off check engine lights. The cleaner unblocks DPFs and, according to Rislone, reduces the need for frequent highway driving to accelerate regeneration. It was specifically designed for vehicles equipped with DOC catalytic converters, DPFs, selective catalytic reduction (SCR) devices, or diesel exhaust fluid (DEF) systems. Works in all fuel tanks, including those with misfuelling devices.