Hello! I have to exchange oil in Vectra C 1.9 CDTI 120 km without DPF theoretically run 300,000. Currently, it is flooded with ELF 5W / 40 oil. From the change to the change, i.e. around 15,000, it will go down from the ruler but I will not top it up. The problem is that the turbo is all wet and very wet, including the bottom of the engine, but the sequence is correct and silent. The engine works a little louder because I have a comparison because my friend has a car with this engine. I want to pour motor oil MOTUL SYNERGIE + 6100 10W40. The question is I going in the right direction?