Yamaha synthetic valve oil is more consistent than traditional oils, giving it better stability in different temperatures. In addition to a smoother feel, you will also be adding to the life of your instrument thanks to a powerful corrosion inhibitor contained in the oil. The regular viscosity formula is a great choice for all around use in any piston valves. It provides a light, quick touch with smooth, long-lasting action. This grade oil will work with all piston valve instruments.