Process for making heavy grade base oil products

A process for making a base oil, which is useful for making a heavy base oil having a viscosity of at least about 12.7 cSt, or at least about 13 cSt, or at least about 13.3 cSt at 100° C., comprising

• contacting a base oil feedstream comprising an atmospheric resid feedstock, and, optionally, a base oil feedstock, with a hydrocracking catalyst under hydrocracking conditions to form a hydrocracked product;
• separating the hydrocracked product into a gaseous fraction and a liquid fraction;
• contacting the liquid fraction with a dewaxing catalyst under hydroisomerization conditions, to produce a dewaxed product;
• and
• optionally, contacting the dewaxed product with a hydrofinishing catalyst under hydrofinishing conditions to produce a hydrofinished dewaxed product;
• wherein the process produces at least one base oil product comprising a heavy base oil product having a viscosity of at least about 12.7 cSt, or at least about 13 cSt, or at least about 13.3 cSt at 100° C.