How long has it been doing it? Just for poop and laughter, I'd change the oil filter and see if it helps it. When I was still working at the shop, a Chrysler Sebring came in doing the same thing. The owner wanted a new oil pump put in, which was a huge job. I noticed it had a POS Fram filter on it.
I suggested trying a new one before tearing into it. The problem went away and never came back. He was a local repeat customer, so I would have probably heard about it if it had.