I’ pretty much with the oil..is oil crowd.
Turbine bearing oil would be ideal if you hinge pin is spinning close to 45,000 RPM. To me oil should do two things well: Lubricate and protect from rust, and for most civilian applications just about any mineral oil will meet those requirements.
Here in the shop I have all kinds of oils, mostly for the machinery. The two oils that I use on guns are LPS2 and a shop made concoction based on the “Eds Red” formula. I like it because it has Lanolin which seems to do a good job of keeping rust a bay for extended periods of time.
LPS 2 I use as water displacing oil for after bluing/CCH, I have a crock pot full of LPS2, and parts come out of the bluing operation, and are put into the LPS pot to soak for a while.
When the guns are assembled, I use the stuff with lanolin, the few areas that need grease will get it…but that’s about it.