Patent ID: 8524069

Claim:
A method for producing a high viscosity base oil having a VI of at least 140 and a viscosity of 4 cSt to 5 cSt at 100° C., comprising: hydrotreating a feedstock containing at least 15 wt % oil in wax under effective conditions for conversion of 4-15 wt % of the feed to products boiling below 370° C.; and catalytically dewaxing the hydrotreated feed under effective conditions to produce a base oil with a VI of at least 140, a pour point of −18° C. or less, and a viscosity at 100° C. that is greater than the viscosity at 100° C. of the feedstock, wherein the yield of base oil across the combination of the hydrotreating and the catalytic dewaxing is at least about 35 wt % relative to the feedstock.