November 2019 I picked up my new KIA Stinger. Currently I have driven 3300 km by car. During this break-in period, I kept a close eye on fuel consumption because this is also a measure of the car's proper functioning. Up to 2000 km I drove very carefully and quietly in ECO and my consumption was on average 8 to 8.5l per 100km (29.5mpg - 27.5mpg). After this period I also started driving in sport mode because I had discovered in the manual that I needed to drive a higher rpm range during the break-in period. Carefully, I have occasionally also asked a little more power from the engine. As expected, consumption also increased. I ended up with 12 to 13 liters (19.5mpg - 18mpg). Not worrying because I was constantly in "sport" mode. 500km later I went back to "COMFORT" and "ECO" mode and noticed that the consumption did not decrease as was the case during the first 2000km. During traffic-free moments I tried to achieve the lowest possible consumption in different ways, at different speeds, but average consumption is no longer below 10 liters per 100km (23.5mpg). Which is strikingly 2 liters higher than before. If I maintain normal driving behavior, the consumption is around 11 liters (21,5mpg). Around 2000km I had also changed wheels (GT) with winter tires. To exclude that this was the cause of the higher consumption, I switched back to summer rims, but gave no difference. Bolts tightened to 110 Nm. I had already tried to refuel super 98 octane. On recommendation of the KIA dealer I also used another gas stations, but without difference. I have already calculated a number of times consumption on the basis of the indicated km driven between refueling and refueled content. Consumption is in reality always 0.5 liters higher vs on-board computer. I regularly feel the brake discs after a ride to make sure there is nothing dragging there, but no heat to be felt. If I read forums about consumption of the KIA Stinger 2.0, consumption between 8 to 9 liters per 100 km is achievable (29.5mpg-27.5mpg). Even on motorway. I mostly drive the same roads with very little traffic. The air conditioning has only a little influence in this cold period. Can you ever think what this could be due to? I want to add that I certainly do not want to complain that the Stinger uses too much fuel. Of course I did not buy the Stinger to drive economically It is just that I am concerned about the good and optimal functioning of the new car.