What happened to the cold car of c5 Citroen?

Hello. C5 cold car can't add oil. Is the hot car normal? If it is. Then basically, the throttle is too dirty and the air intake is insufficient. Or the car often runs at a low speed, and the engine has too much carbon, which leads to the lax valve closing. Can't refuel the door. I hope my answer can help you. Have a nice trip! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.