The heads on the majority of my DE razors (two piece and three piece razors) are chrome plated pot metal. I've never oiled the threads of my razors, but I'm wondering if that would help preserve the life of the these razors. Perhaps adding this to my razor-care routine is going way overboard, but I'm already going far overboard with this hobby. Would oiling the threads on the safety razor significantly help preserve the life of the heads? If oiling the threads is recommended, what oil do you use? I was thinking mineral oil, silicon grease or Vaseline.