The Bajaj Pulsar NS 160cc motorcycle typically requires approximately 1.2 liters of engine oil for an oil change. However, it's essential to consult the owner's manual or the manufacturer's recommendations for the precise oil capacity of your specific model and year. The owner's manual will provide you with detailed information about the correct type and quantity of engine oil required for your Pulsar NS 160cc. It's always best to follow the manufacturer's guidelines to ensure proper lubrication and optimal performance of your motorcycle.