This raises the combustion temperature and lets the DPF reach a high enough temperature to vaporise all the junk out of it. This generally works. Every so often we have to take the filters off and take them to a professional company to get cleaned. This is a specialist process involving high temperatures, lots of pressure and chemicals.

short trips kill DPF's. yeah that's because it's getting full it will regen more and more often and eventually keep regenning constantly until the DPF light comes on and it needs either chem clean or replacing. essentially soot builds - regen, soot burnt off and % ash left behind im not 100% on the g / ML quantity before it requires outside

The warm up time and rubbish economy is certainly true of any petrol engine, more so on the old school ones with carburettors and inlet manifolds or indirect fuel injection but I have always believed that the great advantage of a diesel before they were saddled with DPF's was that compared to petrol they were far more economical in the warm up phase, certainly as soon as the glowplugs stop the NH6zn. 295 184 162 412 69 485 210 139 204

dpf filter skoda octavia 2