Patent ID: 8562819

Claim:
A process to manufacture a base stock, comprising: a. hydrocracking a heavy hydrocarbon feedstock in a hydrocracking zone, wherein the operating conditions in the hydrocracking zone are selected to convert the heavy hydrocarbon feedstock to a product slate containing greater than 20 wt % of a waxy intermediate fraction; b. separating the waxy intermediate fraction into a lower boiling fraction and a higher boiling fraction; and c. dewaxing the higher boiling fraction under conditions whereby the dewaxed higher boiling fraction has: i. a first boiling range from 730 to 1000° F. (388 to 538° C.), ii. a first VI from 105 to 120, iii. a first CCS VIS at −25° C. from 2500 to 4500 mPa·s, and iv. a ratio of a first Noack volatility to the first CCS VIS at −25° C. multiplied by 100 from 0.15 to 0.40, and wherein the dewaxing is hydroisomerization dewaxing, solvent dewaxing, or a combination thereof, wherein the hydroisomerization dewaxing is performed at a total pressure of between about 2000 to 3000 psig.