Low viscosity lubricants based on methyl paraffin containing hydrocarbon fluids

A lubricating oil comprising a major amount of a lubricating oil base stock and a minor amount of one or more additives, said lubricating oil base stock comprising from 5 to 50 wt % of 9-methylnonadecane and from 95 to 50 wt % of 9-methyl-11-octylheneicosane, wherein the base stock has a relationship between Noack volatility at 250° C. as measured by ASTM D5800 (y) and kinematic viscosity at 40° C. as measured by ASTM D445 (x) that is less than y=2.15-0.765*ln(x).

A method for improving one or more of thermal and oxidative stability, deposit control and traction control in a lubricating oil comprising:

• providing a lubricating oil including a major amount of a lubricating oil base stock and a minor amount of one or more additives, said lubricating oil base stock comprising from 5 to 50 wt % of 9-methylnonadecane and from 95 to 50 wt % of 9-methyl-11-octylheneicosane,
• wherein the base stock has a relationship between Noack volatility at 250° C. as measured by ASTM D5800 (y) and kinematic viscosity at 40° C. as measured by ASTM D445 (x) that is less than y=2.15−0.765*ln(x), and
• using the lubricating oil in a formulated oil to improve one or more of thermal and oxidative stability, deposit control and traction control.

A method of making a low viscosity low volatility lubricating oil comprising:

• providing a lubricating oil base stock and one or more additives, wherein the lubricating oil base stock comprises from 5 to 50 wt % of 9-methylnonadecane and from 95 to 50 wt % of 9-methyl-11-octylheneicosane, and
• blending a major amount of the lubricating oil base stock and a minor amount of the one or more additives to form the lubricating oil,
• wherein the lubricating oil base has a relationship between Noack volatility at 250° C. as measured by ASTM D5800 (y) and kinematic viscosity at 40° C. as measured by ASTM D445 (x) that is less than y=2.15−0.765 ln(x).