Liqui Moly 5171 Diesel Particulate Filter Purge Fluid - 500 ml Dissolves typical contamination in diesel particle filters that can rob the vehicle of its performance Effective for closed diesel particle filters on passenger and commercial diesel powered motor vehicles including Cummins and Duramax diesel engines and Sprinter vans Returns the vehicle to optimal driving characteristics, engine performance and lowers fuel consumption Lower fuel consumption means better MPG and money saved Use Liquid Moly's Super Diesel Additive every other fill up; Use Diesel Purge as part of your regular service schedule to clean the fuel system, eliminate knocking and pinging, remove deposits and see a return of smooth engine starts