Common oil drip is the oil filter gasket between the oil filter housing and the engine block. Although the gasket is under 10 bucks, you must remove the radiator fan, radiator fan housing, serpentine belt and alternator in order to access the six bolts that holds the filter housing to the engine block. Over time the rubber gasket becomes hard as rock and no longer seal. The only way that I was able to remove the gasket was to use a heat gun to soften the gasket so that it would come off the aluminum housing. Took me about a half day to take it apart and put it back together. My mechanic wanted $500.00 to fix the leak. There's a youtube video on how to replace the gasket.

https://www.youtube.com/watch?v=Jy0EKjuxlpY