Hello all, I would like to make a very heretical thesis: My Mazda 6 diesel with 143 hp DPF, needs on average about 7 liters/100km. Actually the engine is quite economical: Consumptions well below 6 liters are theoretically no problem. But the diesel particle filter destroys everything! About all 150-200km it has to be regenerated and for this the consumption increases by 3-4 liters/100km. Thus the DPF increases the average consumption by at least 1 l/100km. I drive in the year approx. 35000km. This means that the particle filter costs me at least 400€ per year! So I would have saved the cost of the removal (if possible) and the possibly higher tax quickly again. I can unfortunately not judge what is better for the environment: 1 litre more consumption or higher soot load?!? In addition to the history of better value maintenance (!) of the car! By the regeneration of the DPF the oil is DUTTED, as is well known, there are already considerable amounts of flow I am convinced that without DPF, the engines would last much longer. These all disadvantages do not exist with the retrofit filter. So my question: to expand standard DPF and to clean up the retrofit filter?