For Lead Mold Hinges, any good oil You have on-hand will do...You can save "scraps" from Oil Changes (what's left in the bottles of new oil) and use that for Hinges...or anything else You have that's slick.
Injectors and Tube Inserts, try Worm Oil, Scent Oil, or other Natural Oils that You don't mind on Your plastics. I use Almond Oil here, because it's what I had on-hand when I needed to utilize something. No Petro smell. Light. Cheap. Readily-available...somewhat. You can use Cooking Oil here, just watch for Gumming...over time most Natural Oils will Gum.