ive been thinking about changing what kind of fuel i run. right now im running blue thunder and am thinking about changing to something else, either fantom or trinity. i have a fantom .15 by the way. im thinking of going from 20% to maybe 25 or 30% nitro content also. ive heard that higher nitro content makes the engine run cooler, is this true? if so how much cooler? and if i do change percentage will i get more power? and will it hurt the engine? thanks for your help.