I think the manual states if you see the oil light come on after shut off, then as soon as you can add oil. If the light comes on and stays on, it says to pull over immediately, shut it off, and call for a tow.

Mine has done this occasionally about the same time frame (one or two green lights still on)

__________________
2001 X5 3.0i (PP/WP/AP) Traded at 213K miles
RARE White on Black - Why does everyone get Tan??
First E53 with 215s on XOutpost!!