Oil light is on

I had the same issue on my '01. I hoped the issue would just go away, but when it didn't I took it into the dealership. They found a sensor that had gone bad and replaced it. Fortunately, it was not engine-threatening. As I understand it, oil lights are not designed to tell you if your oil is low, it usually means your pressure is low, which could mean a compression issue. Better get it checked out soon if you haven't already. You may want to find a good auto repair shop (I found one on cartalk.com) rather than taking to the dealer.

Replace the oil sending unit

Had the same problem with my 04 Try using a better brand of oil like mobil. Mine came on when i was using cheap walmart brand oil. Using mobil it has never came back on. Oil pressure is sensitive to oil on this because it runs on low 13 psi max.

Oil pressure and oil level are 2 different things, is this the oil pressure warning light that comes on? If so then the oil pressure sensor may be bad if there is no engine noise. I would have the oil press checked with a mechanical guage though just to be safe, engines cost big $$$$