The recommended oil for a 2005 Ford F-150 V8 5.4L depends on the climate and your driving conditions, but generally Ford recommended
5W-20 for most situations. However, checking your owner's manual is crucial. The manual will specify the exact viscosity grade (like 5W-20 or possibly a different one depending on temperature) and the type of oil (conventional, synthetic blend, or full synthetic). Using the incorrect viscosity can damage your engine.
Always prioritize the information in your owner's manual.
