have you look in the owner manual or on the top of motor where you add oil at.... guessing any kind of oil you want brand wise.... 5w30 to 20 w50 will work just or to any parts store and ask ..Detergent has things added to help clean the motor and non does not which mostly goes in lawn mowers.. but either will work be more like any name brand oil you can buy anywhere most likely 5w30 or 10w30
