I have an oil leak problem near the oil filter so this morning I jacked up the car drained the oil and took off the old oil filter. No debris was noted near the oil filter area and the old filter looked fine. So I replaced it with a new NAPA oil filter and put 4 quartrs of 5W30 in the vehicle and cranked it up and I still noticed what appeared to be a leak near of above the oil filter area. Could the problem be a head gasket, oil line or engine plug, or something else? I will try to diagnose the car again tomorrow. Thanks for your advice.