According to the requirements of Huaneng Qinbei Power Generation Co., ltd, TECWE had sent the skilled workers to their factory to treat the lubricating oil and EHC. Indexes for lube contains demulsibility, RPVOT, air release value, kinematic viscosity, liquid frozen erosion etc, while foam characteristic, air release value, chloride content and kinematic viscosity etc were detected for EHC. After 2 weeks’ treatments, above indexes totally met the national standards enhancing the safety and reliability of the whole unit, which saved much costs for the company.