The recommended motor oil for a 2000 Ford Expedition Eddie Bauer depends on the engine it has. There were a couple of different engines offered that year. To be certain,
check your owner's manual. It will specify the exact type and viscosity (like 5W-30 or 10W-30) of oil recommended for your specific engine.
However, commonly recommended oils for that era Ford Expedition would likely be in the range of 5W-30 or 10W-30. The owner's manual will tell you if a different weight is preferred or required. It may also specify whether conventional, synthetic blend, or full synthetic oil is best.