This will be sacrilege, but for bore cleaning and GP light lube, I have come to Gunk's L104 penetrating oil. The liquid is thinner than ATF, which was my previous favorite. It is partially made with renewable base-stock (soybean esters), and has boron nitride reinforced Teflon as a barrier lubricant. It is the exact same formulation that Radiator Specialties makes for S&W; but at less than half the price (naturally). For slides I use any NGLI 1 or 2 grease or Frog Lube and specifically avoid Moly greases,