Valve oil is a lubricant for valves of brass instruments. It is typically mostly mineral oil with a small amount of other ingredients.
Read more about Valve Oil: Use of Valve Oil, Types of Valve Oil
Famous quotes containing the word oil:
“Is a park any better than a coal mine? What’s a mountain got that a slag pile hasn’t? What would you rather have in your garden—an almond tree or an oil well?”
—Jean Giraudoux (1882–1944)