RE: Percentage of Nitro in the Fuel
hi
from all I have read on this you do have an advantage from 0% to 5%.
you then gain less and less with each increase of 5%. also you engine rpm will be higher and will run hotter than with lower nitro.
also glow plugs won't last as long. some advantage however if cold weather. I usually use 5% on my 2strokes and 15% in 4 strokes.
lower nitro...cheaper fuel
good luck and happy flying
pt19 flyer