Patent ID: 7429318

Claim:
A lubricating oil base stock made by a process which comprises: (a) hydrotrlating a lubricating oil feedstock having a wax content of at least about 50 wt. %, based on feedstock, with a hydrotrcating catalyst under effective hydrotreating conditions; (b) stripping the hydrotreated feedstock to separate gaseous from liquid product; (c) contacting a dewaxing catalyst with a stream containing from about 100 wppm to 10,000 wppm, measured as oxygen, of at least one oxygenate at a temperature of from 120 to 400° C. and a hydrogen pressure of from 791 to 20786 kPa to produce a selectivated dewaxing catalyst; and (d) contacting the selectivate dewaxing catalyst from step (c) with the liquid product from step (b) and dewaxing the liquid product under catalytically effective dewaxing conditions; said base stock having a VI from 145 to 155 measured using ASTM test D2270, a viscosity at 100° C. of from 3.0 to 4.3 cSt and a pour point of from −15 to −40° C.