Each guy has his methods to madness i suppose. Iknow from previous use of a 55 FX with Wildcat 15% and the 16% oil, it still slobbered like mad and was way more than adequate..I think the manufacturer recommends those higher oil contents as a safety factor.. those engines can run fine on less oil than that.. you just have to be careful and know what you are doing.. I certainly hate the oily, nasty mess but not so much yet to justify blending my own fuel..