I am sure you can use motor oil. 20:1. You will leave a smoke trail a mile long doing it. It is better to use a special formulated 2 stroke oil. They burn extremely clean and some of the better 2 stroke oils such as AMSoil will keep your engine clean. Check with Pablo at AMSoil. Good stuff for sure. Enjoy the ride...
I Used Amsoil In My 500 Hp Late Model Dirt Car Back In The Early 1970`s. I Beleive Thats When The Company Was Young . That Was A 4 Cycle, In The Crankcase !! The Oil In The Fuel Is The Only Lubrication The Little Engine Gets. Its Kinda Sorta Important ! That Little Motor Works Hard, It Deserves Good Groceries ! I Have Been Burning The Cheaper Mix Oil In My Saws And Friction Drives This Summer. I Have Had No Problems, But Have Noticed The Smoke . I Am Going To Go Back To Premium Oil. It May Cost About 3 Times As Much, But Still Doesn`t Amount To Much Money. Mho.