My general purpose household oil is 75W90-in-One. I use M1 left over from changing my axles and add a bit of graphite. Works well on bathroom fan motors, house and vehicle hinges, Dremel tool, scissor jacks, etc., places where I can't M1 grease into or where grease would be too thick. Wipe it down after application and a exercising the part/tool. For more delicate mechanisms I'll use Eezox, BreakFree, etc.
For rust protection and some cleaning in the garage I use WD40.