Hello all, I have been the owner of a Seat Leon ST (2018) with the 1.4 TGI engine since last week. I picked up the car in Munich with winter tyres (205 and R16) and drove about 400km home on the highway with an average consumption of 3.6kg/100km at 135kmh cruise. On Friday I put on my summer tyres from the old car (225/35/R19) and drove almost 200km highway on the weekend. I expected some extra consumption, but so much??? Still have the original summer tyres from Seat with 225 tyres and 17 inches. Do you think that would consume less, despite the same tire width? Would it be worth buying a 205 summer tire? Maybe a few TGI drivers can tell me your experiences with consumptions with 17 inches of 225 summer tires. Thank you already! I will drive a lot of highways in the future and then I will be able to drive it makes a big difference in the long term whether I consume 3.5kg/100km or almost double.