NO WORRIES HERE , ENGINE HAS BEEN GONE THROUGH FROM THE OIL PAN TO THE VALVE COVERS ,WITH ALL THE 6.0 UPGRADES PERFORMED BY FORD DEALERSHIP , THIS UNIT HAS BEEN VERY WELL MAINTAINED , WAS USED TO PULL A 2 HORSE TRAILER , CAMPER SHELL , RHINO LINER , LEATHER LOADED OUT WITH SUNROOF , AUTOCHECK CERTIFIED , PRICED BELOW NADA BOOK ..... PRICED TO SELL SO DONT LET THIS ONE GET BY YOU IF YOU ARE IN THE MARKET FOR A GREAT TRUCK FOR A GREAT PRICE !