Patent ID: 8293692

Claim:
A method of improving the lubrication in a combined cycle generator having a multiplier gear, by lubricating said combined cycle generator having a multiplier gear with a lubricating oil composition comprising at least one type of base oil selected from mineral oils and synthetic oils, and a succinate ester and sarcosinic acid as rust prevention agents, wherein the aforesaid base oil displays a kinematic viscosity of 8 to 220 mm 2 /sec (40° C.), total sulphur content 0 to 30 ppm, total nitrogen content 0 to 30 ppm and aniline point 110 to 135° C., and wherein the content of the aforesaid succinate ester is 0.01 to 0.1 wt % relative to the total weight of lubricating oil composition, and the content of a sarcosinic acid is 0.001 to 0.01 wt % relative to the total weight of lubricating oil composition, and wherein the weight ratio of the aforesaid succinate ester content and a sarcosinic acid content is 1:0.01 to 0.7.