What is the lubricant oil?

oil is what you put in you're engine trans transfer case etc it reduces friction and heat so damage doesn't occurWhat is the lubricant oil?
Google it. The question is too vague.





I am assuming that the answer that you are looking for is....





Is an oil that you use to lubricate or lets say to reduce the friction of a contact point or zone. It could be in honing, sharpening knives, engines, surgical (KY Gel), etc.What is the lubricant oil?
ON what...In what


Not enough information....