Nitro helps increasing the power to weight ratio and makes an engine easier to tune.
Why fight about it? Maybe we can get the inventor of nitromethane to chime in here, can't we
I guess we all like the idea of saving some $ on fuel, that is what the discussion was about.

Weather is great around here, if you don't use your planes, your engines will gum up, with or with or without nitro.
Yes, I always forget using after run oil.