Everyone has a favorite system of lubrication/protection and it can be cussed and discussed ad infinitum.
Basically, there are three choices: Oil, grease or dry lubricants and waxes.
Oil is the usual choice, but it is very tricky to get a proper amount applied to moving parts; it needs to be a light enough coating so that it will not become carbon sludge after some firing. It will also migrate, due to gravity. It is the worst choice for protection, since it rubs off on everything it touches...clothing, hands, holster interior, etc. Oil is a lubricant, i.e., it is a substance that is designed to lubricate moving parts. If you choose oil, you can use a silicone rag to protect the pistol's exterior.
Grease is a much better product for lubricating moving parts, in that it lasts longer than oil between moving parts and it is effective under greater pressure. If you choose grease, you can still use a silicone rag to protect the pistol's exterior.
Dry lubricants, especially dry moly disulphide creates a very thin layer of lubricant between moving parts. In that it has a molecular affinity for steel, it will stay put longer than grease or oil and it will not combine with carbon from burned powder to become sludge. There are many different dry lubes to choose from.
Bore cleaning should always be followed by a protective layer of grease or dry lube. Follow the lube with a dry patch. Keep the chamber area free of grease and oil residue, since if present, it will jack pressures up into a spike and its lubricity will prevent a cartridge case from clinging to the chamber walls, thus giving a piston thrust against the slide face upon firing and severely straining the mechanism.
My favorite protection for the exterior of a pistol is silicone auto wax. It is a real chore to apply and rub out, but once applied it lasts for years under normal conditions and it really does prevent rust and corrosion. It will stay put until you remove it with a solvent.
Just remember that moving parts ALWAYS require a lubricant. If you run parts together dry, they will begin to wear and loosen. Do not neglect the slide rails. The trigger and sear mechanism require something like a silicone or moly disulphide grease in minute quantities or a treatment of dry moly lube.
Just follow up with whatever works best for you. There are varying weather patterns across the country, and if you are out in severe weather conditions, take particular care to accommodate your pistol to them. If you are out in a dust or sand storm, strip it down, clean every bit of foreign matter from every surface and re-lubricate.
Clean your pistol at regular intervals if you don't fire it and immediately after firing it, lest you put it off and forget.
Take care of your pistol and it will take care of you when you need it.