I have an oil leak that is dripping a drop at a time from the driver's side rear corner of the oil pan. It looks like it is dripping down the oil pan. Do I have an oil pan leak or is there something else that I should check before I do the (shudder) oil pan gasket job? I have already replaced the valve cover gasket and grommets today hoping that would take care of it but it did not. Any comments would be appreciated.