robs2580

hi guys i have some problems with my car if it gets hot then the car overfeuls bad like u can see the needle is faling i think i get 8 to 10 kpl if cold and 2 6 kpl if hot they said is was the o2 sensor so put a new one it is still the same my idle is rough i stragle to get in gear if car is hot i just service the car what kan it be please i need help it is the 1l and not the new shape had a dinostic test and they said there is nothing wrong but on a full tenk i get 368km thats not normal my frends driving 2011 moddel and get on a full tenk 987 km