Raffinate hydroconversion for production of high performance base stocks

A base stock comprising a viscosity index (VI) of 135 to 140, a sulfur content of 50 wppm or less, a saturates content of at least 90 wt %, a Noack volatility of 14 wt % or less, a pour point of −15° C. or less, a kinematic viscosity at 40° C. of greater than 20 cSt to 40 cSt, and a kinematic viscosity at 100° C. of 3.5 to 4.5 cSt, the base stock further comprising a 3+ ring naphthene content of 1.0 wt % or less.

A base stock comprising a viscosity index (VI) of 125 to 140, a sulfur content of 50 wppm or less, a saturates content of at least 90 wt %, a Noack volatility of 5 wt % or less, a pour point of −15° C. or less, and a kinematic viscosity at 100° C. of 4.5 to 8.0 cSt, a kinematic viscosity at 40° C. of greater than 20 cSt to 40 cSt, the lubricant base stock further comprising a 3+ ring naphthene content of 4.0 wt % or less.

A lubricant composition comprising:

• at least 50 wt % of a first base stock comprising a viscosity index (VI) of 125 to 140, a sulfur content of 50 wppm or less, a saturates content of at least 90 wt %, a Noack volatility of 14 wt % or less, a pour point of −15° C. or less, a kinematic viscosity at 40° C. of greater than 20 cSt to about 40 cSt, and a kinematic viscosity at 100° C. of 3.5 to 4.5 cSt, the base stock further comprising a 3+ ring naphthene content of 1.0 wt % or less;
• and
• an additive, a second base stock, or a combination thereof.