Hello municipality, since my last oil change before 3500 km I have found a small problem. My “tank” oil period. After 2000 km I had to refill 1 liter and after another 1500 km already half a liter. Constantly came this message “Try oil level”. I do not know where the stuff pulls but he does not lose it. At least outwardly there is nothing to see as below and stains are also not in my parking lot. I have 5W40 in it. il it is too thin or is there something bigger broken? I drive daily 200 km highway and am dependent on the good piece. Please help me, the oil is slowly becoming pig expensive