A method for producing a blended lubricant base oil having a viscosity at 100°C in the range of from 2.0 cSt to 5.0 cSt and a Noack volatility in the range of from 10.0 to 18.0, the method comprising: setting a target viscosity at 100°C in the range of from 2.0 cSt to 5.0 cSt and a target Noack volatility in the range of from 10.0 to 18.0 for the blended lubricant base oil; fractionating a feedstock having an initial boiling point of at least 650°F (343°C) and a final boiling point of 1150°F (621°C) or less, the fractionation cut point being selected to form at least (i) a first feed fraction having a viscosity at 100°C at least 0.1 cSt lower than the blended lubricant base oil target viscosity at 100°C and a Noack volatility at least 0.5 higher than the blended lubricant base oil target Noack volatility, and (ii) a second feed fraction; hydroprocessing the first feed fraction to increase the viscosity index to at least 85 and reduce the pour point to -10°C or less; hydroprocessing the second feed fraction to increase the viscosity index to at least 80 and reduce the pour point to -5°C or less; fractionating the hydroprocessed first feed fraction, to form a first product fraction having a viscosity at 100°C of at least 1.5 cSt and a Noack volatility of less than 20.0; fractionating the hydroprocessed second feed fraction, to form a second product fraction having a viscosity at 100°C of 5.0 cSt to 12.0 cSt and a Noack volatility of 5.0 to 10.0; and blending a portion of the second product fraction with the first product fraction to form the blended lubricant base oil, the blended lubricant base oil comprising 30 wt% or less of the second product fraction, the viscosity of the blended lubricant at 100°C being greater than the viscosity of the first product fraction by at least 0.1 cSt, the Noack volatility of the blended lubricant base oil being less than the Noack volatility of the first product fraction by at least 0.5. setting a target viscosity at 100°C in the range of from 2.0 cSt to 5.0 cSt and a target Noack volatility in the range of from 10.0 to 18.0 for the blended lubricant base oil; fractionating a feedstock having an initial boiling point of at least 650°F (343°C) and a final boiling point of 1150°F (621°C) or less, the fractionation cut point being selected to form at least (i) a first feed fraction having a viscosity at 100°C at least 0.1 cSt lower than the blended lubricant base oil target viscosity at 100°C and a Noack volatility at least 0.5 higher than the blended lubricant base oil target Noack volatility, and (ii) a second feed fraction; hydroprocessing the first feed fraction to increase the viscosity index to at least 85 and reduce the pour point to -10°C or less; hydroprocessing the second feed fraction to increase the viscosity index to at least 80 and reduce the pour point to -5°C or less; fractionating the hydroprocessed first feed fraction, to form a first product fraction having a viscosity at 100°C of at least 1.5 cSt and a Noack volatility of less than 20.0; fractionating the hydroprocessed second feed fraction, to form a second product fraction having a viscosity at 100°C of 5.0 cSt to 12.0 cSt and a Noack volatility of 5.0 to 10.0; and blending a portion of the second product fraction with the first product fraction to form the blended lubricant base oil, the blended lubricant base oil comprising 30 wt% or less of the second product fraction, the viscosity of the blended lubricant at 100°C being greater than the viscosity of the first product fraction by at least 0.1 cSt, the Noack volatility of the blended lubricant base oil being less than the Noack volatility of the first product fraction by at least 0.5.