As mentioned diesel cars oil becomes black within literally seconds of putting it in,its not cause dealer hasn't changed oil.
Could be pressure sensor fault,wiring,cluster or battery voltage problems causing your display to show high oil level.Often(as on multiplas)simply disconnecting battery for few minutes can cure this.
Could be pressure sensor fault,wiring,cluster or battery voltage problems causing your display to show high oil level.Often(as on multiplas)simply disconnecting battery for few minutes can cure this.