The recommended oil grade for a 2006 Ford Falcon depends on the engine type and your location's climate.
You must consult your owner's manual. It will specify the recommended viscosity grades (e.g., 5W-20, 10W-30) and oil type (synthetic, synthetic blend, conventional).
Using the incorrect oil grade can damage your engine. Don't rely on online information; always check your owner's manual for the definitive answer.
