Hey, today I bought a bottle of the Nulon Total Petrol fuel system cleaner as it says that it will completely clean the fuel system and even go as far as cleaning the intake ports getting rid of the carbon. I'm not sure if this additive will be ok for the engine but if so then hopefully it gives it a good clean. Just would like to know if this stuff works and won't damage anything. I have an N14 SSS with the SR20DE. Thanks, Corey.