ORIGINAL: loughbd
You better tell that to my YS's. They all run on YS20/20 fuel. I use Enya #3's in them and they run just fine. No smoke and no excess fuel consumption. 20/20 is 20% nitro and 20% oil.
YS with their pressure boost may be an exception. But have you tried plugs such as the Fox Miricle and K&B 4C? A colder plug may give more power and less fuel consumption. However lack of smoke is an indication that you are at least close.
You said the hotter the better, so why are you using a non fourstroke plug that is cooler than the OS F? And much cooler than the Thunderbolt 4C.