This is a post in a 1911 forum from Keith @ Dan Wesson:
However, for a tight 1911 I only recommend DW rail lube, FP-10 or Militec 1. There may be other good choices out there but these have been proven here.
Oils such as Rem oil, Hoppe's and the like, I only recommend for the surface and small moving parts.
Also, Beware of gun cleaners such as CLP that is not polymer safe. Though our Duty finish is not Polymer these "gun scrubbers" will damage the look of our Duty finish. Using oil as a cleaner is all you need. A little oil, nylon brush and elbow grease does wonders. Kroil, btw, is a great oil cleaner. It will even remove copper fouling from your barrel. Bench rest shooters have been using it for years.