I would first check to see if any codes are set,and proceed from there,there is a TSB on the flex,also any oil around the rear valve cover and oil seperator by the pcv,oil in the spark plug wells.
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV)
Date Reported:
MAY 01, 2013
NHTSA Reference:
#10053358
TSB Reference:
#ASI-32211
Description: FORD: ON SOME VEHICLES, THE INTAKE AIR SYSTEM COMPONENTS MAY HAVE ENGINE OIL ACCUMULATION, IN LEFT HAND VALVE COVER BAFFLE MIGRATING THROUGH FRESH AIR INTAKE OF POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM. MODELS 2011-2013 EDGE, EXPLORE
Want to learn how to fix NHTSA #10053358?