The high-effective multifunctional lube oil additive (GSBT), being a borates com-plex containing S, P and N, was evaluated on SRV and four-ball testers.

• GSBT高效多功能有机棚酸酯润滑油添加剂是一种主体组分为含硫、磷、氮等元素的复合硼剂。