RE: nitro
I don't understand why you would "clean" and "protect" with a product that doesn't mix with the fuel. I mean, WD40 is after all 45-50% stoddard solvent. I believe most stoddard solvents are napthalene based. Basically zippo lighter fluid. Cleaning one-way clutches with it? Why not use the solvent that the oils were dissolved into in the first place? Methanol works far better for cleaning than anything petrol based and it evaporates 10x faster than that WD40 crud. I mean... Doesn't Werks fuel work for cleaning too? The oils in that stuff is so fantastic, it should work for air filter oil too I would think. Or wd40.
I guess I tried to look at this WD40 phenomena from a logical standpoint. I asked myself what was so logical about using it in a model engine but I came up with nothing.. I should have kept my fingers quiet. I better put my helmet back on and buy brushless stuff.