Had same issue on my 2016 R60 Countryman S. My notification for low oil pressure only occurred when I turned left at intersection or roundabout. It was strange. I took a flash light and looked around and engine bay and noticed that there what appeared to be fine misting of engine oil around valve cover toward washer fluid tube. Took Mini into dealership and they discovered that the valve cover gasket on the right side had a crack hence when I turn a certain direction the valve cover would open up just enough to spray oil out and loose pressure. Replaced valve cover and gasket and works perfectly now. Just thought I share if your mini has this weird low oil pressure when you are turning.
Pros: works perfectly now
Cons: low oil pressure
Vehicle:
MINI Countryman
