Lubricant base stock production from recycled oil

A method for producing a lubricant base oil product, comprising:

• introducing a first feed via a first line to a scrubbing zone of a reactor to form a scrubbed first feed, the first feed comprising a used lubricant oil comprising a viscosity index of 70 or more;
• introducing a second feed via a second line to the scrubbing zone of the reactor to form a scrubbed second feed, the second feed comprising a coker feedstock comprising a T10 distillation point of 450° C. or more,
• exposing the scrubbed first feed and the scrubbed second feed to a fluidized bed in a coking zone of the reactor at a residence time of about 1 second to about 30 seconds, the fluidized bed comprising solid particles under fluidized coking reactor conditions including a temperature of at least 510° C. to form a coker effluent, the fluidized coking conditions comprising 10 wt % or more conversion of the feedstock relative to 450° C., the fluidized coking conditions being effective for depositing coke on the solid particles;
• passing at least a portion of the solid particles comprising deposited coke from the reactor to a coke combustion stage;
• removing from the coke combustion stage a first portion of partially combusted solid particles, a rate of removal of the partially combusted solid particles comprising 1.5% or more on a weight basis of a rate of introduction of the feed into the reactor;
• separating at least a coker gas oil product from the coker effluent;
• and
• hydroprocessing at least a portion of the separated coker gas oil product under effective hydroprocessing conditions to produce a hydroprocessed coker gas oil having a sulfur content of 100 wppm or less.