It comes out discoloured even after a low mileage. In fact it looks greyer as it drains than it does in the catching receptacle. I would change it after that mileage. My Roadster has had two changes in 16,000 miles, and the Plus 4 the same.
DaveW '05 Red Roadster S1 '16 Yellow (Not the only) Narrow AR GDI Plus 4
