So I checked it back and forth now. ARAL is clearly the best diesel fuel on the market. There is no other with it. Advantages : 1) Much quieter at the cold start. 2) Quieter during the ride. 3) Turning joyous 4) On night trips I see hardly any soot development in the rear-view mirror. At diesel of a free petrol station I could also be a locomotive I just don’t understand how ARAL manages to make the diesel more soot-free ? The basic fuel is supposed to be the same ? ditive added. Greetings