So I got my first ever Swiss Army Knife 2 months ago. It’s a Victorinox Huntsman with 14 tools (the one with the saw). I have not used it extensively yet, but I wipe it clean every time I use it.
I’m not aware of when and how often I should oil the moving parts and things like that. I would like to keep this knife in working condition for as long as I can.
I’ve had mine for about 35 years and done minimal maintenance. I’m about to send it to Victronox for a “spa visit” because the red casing got cracked. They will do a full cleaning and overhaul (and repair) on it for a very reasonable price. They really do stand behind their work.