The service manual says kerosene. Takes all the guesswork out!So, which is it, WD-40 or Kero? I know kero is a petroleum product and naturally it has some properties relative to oil but, it still has enough acidic properties to remove dirt and excess wax. Also, WD-40 has petroleum distillates but, it does not say it is safe to use on rubber parts. I am concerned if it will deteriorate the seals in the links. Anyone got the true answer to this age old dilema?