What type of oil should you put in 2001 Ford Expedition?

The recommended oil type for a 2001 Ford Expedition depends on the engine it has. Ford Expeditions from that year came with either a 4.6L V8 or a 5.4L V8. You MUST check your owner's manual to be absolutely certain. The manual will specify the correct viscosity (like 5W-30 or 10W-30) and the type of oil (conventional, synthetic blend, or full synthetic).

However, in general, for both engines in a 2001 Ford Expedition, a 5W-30 oil is a common and often recommended viscosity. Whether you use conventional, synthetic blend, or full synthetic is a matter of preference and budget; full synthetic generally lasts longer and provides better protection under harsh conditions, but is more expensive. Always use oil that meets or exceeds the specifications listed in your owner's manual. Don't rely solely on online information; consult your owner's manual.