Only on my third tank of 91 fuel but just went for a cruise in eco mode of an hour sitting on around 80 kmh and using 8.9 l per 100 according to the readings on the dash. Have some of the dash info setup so it clears and restarts at the start of each trip. Done just under a 866km with an average fuel consumption of 10.6. Not sure why some of you are going to use 95 or 98 Oc fuel on some fillings. What do you think will happen can you tell please. I noticed in the manual that it advises to add a fuel additive each 10000 km. I’m guessing thats to help clean the injectors or is for some other reason?