Do this first before anyting too extreme , Pop your hood , check out the oil cap , look underneath the il cap for a white goo , if there is white coloring , you have a bad head gasket ( with only 7300 miles you should be under warranty and fall well within warranty limits defect limits. ) I have 18K on mine and nothing yet.
Ok , so if there is no white goo , next thing is pull your dip stick out and check it for a white substance on the dipstick , same as above applies. If not , next , go to the rear of the car , run your finger around the inside of the exhaust tips and see if it's a carbon build up or a oily build up , if it's oily , you probably have valves screwed or some burnt rings. or possibly too much oil in the pan which can cause this too. Let me know how this turns out , I will help you from here after you check those. Good luck