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 have and use my father’s knife, and it really doesn’t need maintenance. He always carried it in his pocket, and I often carry it in mine. A few times a year, I’ll open all the implements, spray with detergent, scrub out dust and dirt with a toothbrush, and let it dry. That’s pretty much all it needs.