However, generally speaking, for gasoline engines in that era, a common recommendation was 5W-30 or possibly 10W-30. The owner's manual will specify the weight and whether it should be conventional, synthetic blend, or full synthetic. It will also specify the API certification (like SL, SM, or SN) which is crucial for engine protection.
Do not rely on general advice. Always consult your owner's manual for the precise oil type and viscosity recommended for your specific 2002 Ford E-150 engine. Using the incorrect oil can damage your engine.
