Oil light on for 10 mins then goes off. Whats wrong?
 

2000 Grand Marquis
154K and runs great..25MPG average

The oil light pops on when starting the engine after sitting 3 hours or more. Light Stays on for 10 mins then goes off. Car runs fine otherwise and I been using the car like this for about a month.

Now, Im thinking its the oil pump or the switch.

What do you think?

Thanks

update...

I ran the car a bit low on oil so the oil light went on.
I disconnected the battery for 2 hours and it seems the light is off.
thankfully