Right after my oil change, I went to AAP to get my battery tested. Unfortunately, I saw light color smoke coming from the F23A1 motor. Friends were split between coolant leak or the head gasket going bad.
Oil changes drip oil onto the flex pipe. That happens when you put an oil filter horizontally on the side of the engine block directly above the exhaust pipe. I would venture to say it was the oil burning off.
My car smells like burning oil for a week after every change.