The engine oil capacity of a Honda Activa 110cc scooter typically ranges between 800 ml to 900 ml. However, it's essential to refer to the owner's manual or consult with a Honda dealership or authorized service center to obtain the specific and accurate engine oil capacity for your particular model and year of the Activa 110cc scooter. The owner's manual or the service center will provide you with the recommended type of engine oil as well. Following the manufacturer's guidelines ensures the proper functioning and longevity of your vehicle.