I ran out of room in the title, what I was wondering if a castor 2-stroke mix oil can be added to the gas versus the TCW-3 that is commonly recommended? Its going in a powersport ( dirtbike ) gas tank... Its a 4 stroke bike, but I have some castor oil left over from a 2 stroke I once had. Would it be alright in the carb, could it cause gumming on the valves?