RE: gas engine + nitro???
The engine would probably run erratic and the engines idle and power would be all screwy. Then again it could work. It may not even have a difference.
but I would only add in a very small amount and see how the engine responds, if nothing happens, add alittle more and then see what happens then.
Is the nitro your using, just normal glow fuel (like with methonol and oil mixed with it) or is it just straight nitro?