2004 EB 4x4 Expedition 5.4 My 2004 EB Expedition 5.4 has 83,000 miles. In the morning when I crank it I can hear a rattle (lifters) for just a couple of seconds. I am running a Valvoline synthetic mix. Should I go full synthetic or is there something else I can do to make sure the top part of the motor stays lubricated.Thanks>JP |