15% or 30% nitro?

[Dilbeck]

See a lot of people flying with 15-20% nitro. Question is what are the performance issues or any reason not to run 15% over 30% its 1/2 the cost.

[Dilbeck]

Found my own answer on another site, 12.5% cool power mixed with 30% cool power 50/50. Gives same power and lubracation but cost less and has less smoke. What a dream mix!