Mike,
Don't think this would be a problem. Most fuels have about the same amount of lubrication, so you should be fine there.
Obviously, mixing two different nitro percentages will give you something in between.
I run Wild Cat fuels, but have to mix a half gallon of 65% fuel with a 1/2 gallon of 45% to get the 55% fuel I run in my 7.5 K&B Pro and my 3.5 CMB 21 inboard.
Jerry D.