Hello, I am looking for a solution to an oil leak that just started. It is not a drip but actually equates to at least a square foot of oil after parking. I recently changed the oil myself for the first time. I did have a hard time with the filter, but with the right tool, it went fine. My oil even with the leak is full. Also I checked the oil sensor for leak and no leak. The leak is directly under the pan, and I tightened the bolts on the pan, but still leaks. I have a mechanic who will look at it next week, but I am a hands on kind of guy, and would like to get this done myself. I have over 256k miles on this engine. All advice would be greatly appreciated.