What kind of oil do you use in a polaris sportsman 90?

For a Polaris Sportsman 90, it is recommended to use 2-stroke engine oil specifically designed for air-cooled engines. Look for an oil that meets the API TC or JASO FB standards for optimal performance. Always check the owner's manual for specific guidelines on oil type and mixing ratiOS. Regular maintenance with the correct oil helps ensure the longevity and performance of the ATV.