I hadn't drive it for three days until yesterday. I went about 12 miles round trip, hitting a few lights and stop signs and didn't have it come on until I pulled into the garage.
The last thing I want to try before I go through dropping the pan is to drain the oil and run a brush into the drain hole to see if I pull anything out. I know its a stretch, but I have a new nylon gun cleaning brush that would work perfect. I can fish it in there and see if it pulls out any chunks of sludge.