Bright Stock Refined,high viscosity lubricating oil usually made residual stocks by suitable treatment,such as a combination of acid treatment or solvent extraction with dewaxing or clay finishing.

• 光亮油通常由渣油经加工处理而制成的精炼、高粘度润滑油。加工处理的方式包括：酸处理（或溶剂萃取）脱蜡（或粘土精制）相结合。