What type of Rust/corrosion resistance application does HK use? I read the owners manual and the only thing it stated was not 2 use oil that brags on it availibilty to penetrate metal. (I usually use tetra metal conditioner. This is exellent product. It makes cleaning bores smooth/easy) Since of the warning that it could interfer with their protection I did not use tetra. Does HKs fit tight where a thin lube is required like break free clp? I use break free greased lighting. The greased lighting is used for rapid semi auto and prevents S.S from gauling. I want 2 make sure my HK is not starved for lube. Lucas oil now makes a oil for guns( I am also a car guy, Lucas makes one of the best oil stabilizers, fuel cleaners, differential fluids) Has anyone used it or know of it performance in guns??