Its only messy if you let your ol' man with his shakey hands put fuel in the tank. my dad shakes like crazy when hes tryin to work on small stuff,so when he trys to put the fuel in he spills some on my tank and in my car. i own a nitro evader st, soon a losi aftershock. if your too lazy to clean up after every other run than dont get a nitro,otherwise its awesome,the sound and speed is always the best.