Keep the DPF filter on your Diesel exhaust free from expensive blockages with this Carlube DPF Diesel Cleaner. The filter stops harmful gases and soot from escaping into the atmosphere, however for the unit to burn this collected gas and soot, the car needs to be run at high temperatures for long journeys, which is not always possible. You can reduce the risk of a trip to an expensive mechanic by regularly using this product to keep your filter unblocked.