Generally, modern Ford Expeditions often use synthetic blend or full synthetic oil meeting the specifications listed in your owner's manual. This might be something like 5W-20, 5W-30, or even 0W-20, depending on the engine and climate. The manual will specify the oil's viscosity grade (like 5W-30) and the API certification (like SN or SP). Never deviate from the manufacturer's recommendations.
Using the incorrect oil can damage your engine. Always refer to your owner's manual for the most accurate and up-to-date information. The information printed inside your vehicle is paramount.
