1. Your vehicle's engine may be equipped with Active Fuel Management™. This system allows the engine to operate on four or eight cylinders, depending on the load.
2. The system keeps all eight cylinders firing when high power is required, such as when accelerating from a standstill, overtaking or merging on highways.
3. The system automatically switches to four-cylinder mode when less power is required, such as when driving at a constant speed. This improves fuel efficiency.