Water-cooled two-stroke gasoline engine oils were mainly used in outboard marines ( also called motorboat). The high-grade oils are required to have not only better detergency for friendly environment, but also the excellent lubricating quality to ensure their reliability. 水冷二冲程汽油机油主要应用于水上作业的舷外机(摩托艇)等动力机械,高档的水冷二冲程汽油机油既要具有环境友好的清净性,又要具备优秀的润滑性,才能保证其可靠性。