Shape selective dewaxing using coke modified large pore zeolites

A process for dewaxing a wax containing hydrocarbon oil feedstock comprising

• providing a coked zeolite containing catalyst,
• wherein said coked zeolite contains 10 to 60 weight percent coke,
• wherein the zeolite, prior to being coked, has a constraint index less than 1, wherein the zeolite is subjected to coking with a coke precursor at coking conditions including a neutral or reducing atmosphere where the hydrogen partial pressure of said reducing atmosphere is less than about 20 atmospheres absolute, to effect relatively uniform coke distribution to restrict the pore size of the zeolite without plugging up the external surface and without unacceptably decreasing the surface area thereof and
• contacting said feedstock with said catalyst in the presence of hydrogen at hydrodewaxing conditions to selectively dewax said feedstock.