What is the case with diesel PF? I don't think they can be removed and run the car without them. I expect petrol PFs will work the same.

Second, after a decade diesel PFs seem to work without general problems. They are self cleaning in that there is an engine software facility that burns any residues or they are quickly burnt by a short drive in a lower gear.

I like petrol engines with PFs. All this soot emanating from direct injection is gone. You can rub inside the exhaust pipe without even a speck of soot in sight. 


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"Porsche....and Nothing else matters"