A PROCESS TO MAKE A 110 NEUTRAL BASE OIL WITH IMPROVED PROPERTIES

摘要

A process to manufacture a base oil, comprising selecting an original base oil having an original VI, an original volatility, and an original CCS VIS; and removing a lower boiling fraction, whereby the base oil is made having a kinematic viscosity at 100°C from 4.2 to 4.6 mm2/s, a VI that is at least 4 higher than the original VI, a volatility that is at least 3 wt% lower than the original volatility, and a CCS VIS that is within 200 mPa.s of the original CCS VIS. A process to manufacture a base oil, comprising selecting an original base oil and removing a lower boiling fraction from the original base oil, whereby the base oil has a ratio of a Noack Volatility to a CCS VIS at -25°C multiplied by 100 from 0.80 to 1.55. Also a base oil, made by the processes disclosed herein.