What kind of oil goes in a 2000 kawasaki prairie 400?

For a 2000 Kawasaki Prairie 400, it is recommended to use 10W-40 oil, which is suitable for both hot and cold temperatures. You can use either conventional or synthetic oil, but make sure it meets the API (American Petroleum Institute) service classification of SG or higher. Always check the owner's manual for specific recommendations and capacity for optimal performance.