I usually oil my firing pin in my 1911 and its spring and put a drop in the tunnel, mainly because I live by the ocean and I am paranoid of the spring rusting, etc.

I believe I've heard this is bad, but I don't know why?  Ive shot thousands of rounds through it with an oiled firing pin.  It is however a wilson bulletproof pin too.

Any help would be greatly appreciated.

Doesnt need it.

Invites debris to collect there.

In a holster, the oil will leech downward naturally, onto and into your primer, thus making your 1st round a dead round.

Don't do it. The oil can kill your primers and invites crud to build up sooner in the firing pin channel. This can cause your pistol to fail to fire. Keep it clean and dry.

Yeah, what he said

Obviously, you don't need to pack it with grease, I think we agree on that.
For my usage...storage/range use, and never holstered, my needs may differ from CCW types, so what ever residual oil is on my fingers when reassembling, the spring and firing pin get it.
That's a very thin film.
I don't want to be surprised with a chunk of rust where a firing pin once lived.
That happened to the rear Accro sight on my King Cobra, I had to drill out the old rusted spring chunks. (purchased that way)
Of course there's no live primer involved, so it gets squirted.
I've been playing with industrial dry lubes on .22's and they do seem to stay cleaner longer.
I should try 'em in the 1911's firing pin channel, kinda splitting the diff between rust or a protective coating that dries...another experiment for my list.