It is possible.The level of filling of the DPF with soot is measured by the ECU via the pressure differential sensor,i.e. it measures the backpressure before and after the DPF.If someone can get actual values from the ECU,pour the said additive and then get actual value after a few hundred miles we will know if it works.I can do that test,but I didnt see any such additives here on the US market.