Yamaha Synthetic Valve Oil, Bottle, Vintage.
The Vintage Superior Oil is designed for instruments with large valve tolerances, such as vintage or low brass instruments.
• Synthetic formula that is more consistent than mineral-based oil to provide superior performance in all playing environments
• Made up of even-sized molecules to allow the oil to evaporate smoothly, guaranteeing a longer life with extremely responsive action
• Same oil that is included with all Yamaha low brass instruments