first of all , i think he was being general... not like only use like 3 drops.. second, it does NOTHING to totally flood the motor of oil.... just if you want to waste it....10 to 15 drops max is plenty. and it only takes 10 seconds to do. third, marvel mystery oil is 100% fine to put in thru the carb as it WILL NOT harm o rings.. hell you put it in your gas tank, tranny, just about anything and it doesnt hurt them.. and there is NOTHING wrong with a touch of castor in your oil mix.. yes its messier, but as stated.. if you botch a needle setting its not gonna hurt your motor for the most part.(just makes it ugly)