Oil Loss V90 D5 pp AWD Inscription. HELP!

[mcmillanja]

I have a 2017 D5 Awd Pp Inscription. I have no idea which engine model this is however.... it was serviced by a main dealer one week ago. On return I noticed it was four marks away from full on the digital oil indicator.

I phoned them to be told that they do this so that during the DPF cycle some oil can come back.... Sonetging to do with biofuels I think they said.

Today one week on another four bars have gone somewhere. I e checked under the car for leaks and in the engine bay but can’t see anything that would suggest an oil leak.

Any ideas where this oil is going and if to see more disappearing. They filled it with 0W 20 Castrol Professional. It now reads nearly a full quarter of the max which I never seen this amount going in the year I’ve owned it.