Lubricating oil compositions comprise one or more polytetrahydrofuranes that are prepared by alkoxylating polytetrahydrofurane with at least one C8-C30 epoxy alkane.

The present invention provides a lubricating oil composition comprising: (A) a lubricant base oil including at least one type selected from mineral oil, PAO, and GTL (gas-to-liquid) base oils; (B) a compound having a structure obtained by independently subjecting propylene oxide to addition polymerization with an alcohol or a structure obtained by subjecting a combination of propylene oxide with ethylene oxide and/or butylene oxide to addition polymerization with an alcohol, and being configured so that polyalkylene glycol (PAG) with an oxygen/carbon weight ratio of 0.35 or more and less than 0.45 and/or one or both terminal hydroxyl groups in the polyalkylene glycol (PAG) are blocked; and (C) a fatty acid ester having an oxygen/carbon weight ratio of 0.05 to 0.35.

The present invention provides a lubricating oil composition comprising: (A) a lubricant base oil including at least one type selected from mineral oil, PAO, and GTL (gas-to-liquid) base oils; (B) a compound having a structure obtained by independently subjecting propylene oxide to addition polymerization with an alcohol or a structure obtained by subjecting a combination of propylene oxide with ethylene oxide and/or butylene oxide to addition polymerization with an alcohol, and being configured so that polyalkylene glycol (PAG) with an oxygen/carbon weight ratio of 0.35 or more and less than 0.45 and/or one or both terminal hydroxyl groups in the polyalkylene glycol (PAG) are blocked; and (C) a fatty acid ester having an oxygen/carbon weight ratio of 0.05 to 0.35.

A lubricant composition comprising from 75 to 95 percent by weight polyalphaolefin base oil; and from 7.5 to 25 percent by weight oil soluble polyalkylene glycol (OSP) additive, wherein the polyalkylene glycol has a viscosity at 40 C. from 15 cSt to 50 cSt and comprises units derived from propylene oxide and units derived from butylene oxide; wherein the lubricant composition exhibits a four ball EP weld load result of at least 160 kg and an air release value at 75 C. of less than 3 minutes is provided.

A lubricant composition comprising from 75 to 95 percent by weight polyalphaolefin base oil; and from 7.5 to 25 percent by weight oil soluble polyalkylene glycol (OSP) additive, wherein the polyalkylene glycol has a viscosity at 40 C. from 15 cSt to 50 cSt and comprises units derived from propylene oxide and units derived from butylene oxide; wherein the lubricant composition exhibits a four ball EP weld load result of at least 160 kg and an air release value at 75 C. of less than 3 minutes is provided.

A concentrated metalworking fluid comprising from 60 to 90 percent by weight base oil selected from the group consisting of water soluble polyalkylene glycols, methoxypolyethylene glycols, polyethylene glycols, and combinations of two or more thereof; from 5 to 20 percent by weight glycol ether; from 0.01 to 5 percent by weight oil soluble polyalkylene glycol; and from 0.2 to 6 percent by weight one or more additives selected from the group consisting of anti-weld agents, corrosion inhibitors, extreme pressure additives, buffers, biocides, lubricity additives, and combinations of two or more thereof is provided. Further provided is a metalworking process.

A concentrated metalworking fluid comprising from 60 to 90 percent by weight base oil selected from the group consisting of water soluble polyalkylene glycols, methoxypolyethylene glycols, polyethylene glycols, and combinations of two or more thereof; from 5 to 20 percent by weight glycol ether; from 0.01 to 5 percent by weight oil soluble polyalkylene glycol; and from 0.2 to 6 percent by weight one or more additives selected from the group consisting of anti-weld agents, corrosion inhibitors, extreme pressure additives, buffers, biocides, lubricity additives, and combinations of two or more thereof is provided. Further provided is a metalworking process.

Provided are lubricant compositions comprising a hydrocarbon base oil and a polyoxybutylene polymer prepared by polymerizing butylene oxide with a monol initiator and having a number average molecular weight ranging from 800 g/mol to 1200 g/mol. The polyoxybutylene polymer functions as a highly active friction-modifier additive.

Provided are lubricant compositions comprising a hydrocarbon base oil and a polyoxybutylene polymer prepared by polymerizing butylene oxide with a monol initiator and having a number average molecular weight ranging from 800 g/mol to 1200 g/mol. The polyoxybutylene polymer functions as a highly active friction-modifier additive.

A lubricant formulation contains: (a) at least 50 weight-percent hydrocarbon base oil; (b) five to 50 weight-percent of an oil soluble polyalkylene glycol selected from monol, diol and triol initiated 1,2-butylene oxide homopolymer and monol initiated copolymers of 1,2-butylene oxide and propylene oxide; and (c) 0.1 to five weight-percent or less of a sulfurized olefin; where weight-percent is based on total lubricant formulation weight.