I'll have to dissagree with freebird, the Magnums I've used have all been very close to the Satoes and OS's in power and performance, a great buy, especially for the newcommer. Just remember that you can not put afterrun oil down the carb on a four stroke and expect it to help. You must inject it into the crankcase thru the breather tube, at least a teaspoon full then rotate the prop with the engine pointed down to flood the front bearing with the after run oil. If you want an economical source of after run oil, ust ATF or Rislone (in the yellow can), as good as any of the high priced after run oils. You can also use any air tool oil. Some people us Marvel Mystry oil but that is not the best choice as it has little or no water protection. Marvel Mystry Air Tool oil is okay. Do not use WD40 or light weight oils such as sewing machine oil.