Hello, the topic has certainly been dealt with here before. I filled last week, exceptionally once at ESSO (dried diesel in the offer 1,10 €) and then chased as always the whole week over the highway. Amazingly here is that the verbauch has dropped to 6,5 l. Otherwise I always need with full gas runs by 7,0 l. And I am heated as always and the climate automatic was also on and 2Tact oil I also poured in before refueling, as always (in order to prevent this question) n) How can that be?