Can you use Mobile 1 10W-30 Synthetic Oil in your 2004 Ford Expedition 5.4 Liter?

Yes, Mobile 1 10W-30 Synthetic oil is generally suitable for a 2004 Ford Expedition with a 5.4L engine. However, you should always double-check your owner's manual. It will specify the recommended oil viscosity and type (synthetic, conventional, etc.). While 10W-30 is a common viscosity, the manual might recommend a different one, especially depending on your climate and driving conditions. Using the wrong viscosity could affect engine performance and longevity.