Sure its your oil pan, I don't know of anyone ever having to replace their gasket unless it was due to something hitting the pan itself. It might be your oil seal behind the pulley, it is typical for Altimas to have this happen.
Ok well my mom used the car this morning and hit my oil pan with god knows what and its leaking. Anyone know a way of getting this fixed, or do i have to get the whole pan replaced? Its pinched like a soda can after you start crushing it.