A method for improving fuel efficiency and reducing frictional properties while maintaining or improving deposit control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including from 75 to 95 wt % of lubricating oil base stock including a Group I base stock or a combination of a Group III, Group IV and Group V base stock including from 30 to 35 wt % Group III, 45 to 55 wt % Group IV and 0 to 5 wt % Group V and a friction modifier mixture comprising a polymeric ethoxylated fatty acid ester at from 0.1 to 1.0 wt. % and a mixed glyceride ester at from 0.1 to 1.0 wt. % of the formulated oil. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.

The disclosure relates to novel non-fossil, high performance sustainable lubricants.

A power transmitting fluid comprises a major amount of a lubricating oil and a minor amount of an additive composition. The additive composition comprises:

(a) a friction modifier of the formula:

##STR00001##

(b) an oil-soluble phosphorus compound; and,
(c) an ashless dispersant;
wherein R.sup.1 and R.sup.2 may be the same or different and represent linear or branched, saturated or unsaturated hydrocarbyl groups having from 8 to 20 carbon atoms. Z represents a polyoxyalkylene segment or a polyalkoxylated alkyl amine segment. The friction modifiers provide the fluid with improved fluoroelastomer seal compatibility and enhanced copper corrosion compatibility.

Provided herein are grease compositions comprising at least one estolide compound of formula:

##STR00001##

in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 2; R.sub.1, independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R.sub.2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R.sub.3 and R.sub.4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are methods of making estolide-based grease products.

A lubricant additive for introduction into a AC/R system to improve lubricant miscibility and performance in the AC/R system.

A method for improving fuel efficiency and reducing frictional properties while maintaining or improving deposit control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including from 75 to 95 wt % of lubricating oil base stock including a Group I base stock or a combination of a Group III, Group IV and Group V base stock including from 30 to 35 wt % Group III, 45 to 55 wt % Group IV and 0 to 5 wt % Group V and a friction modifier mixture comprising a polymeric ethoxylated fatty acid ester at from 0.1 to 1.0 wt. % and a mixed glyceride ester at from 0.1 to 1.0 wt. % of the formulated oil. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.

The presently claimed invention relates to a lubricant composition comprising at least one beta-glucan, optionally in form of one of its derivatives, at least one base oil, at least one additive component, and optionally water; the use of said lubricant compositions for reducing wear in metal-on-metal contact and the use of at least one beta-glucan for reducing the friction coefficient of a lubricant composition.

A lubricating oil base stock including one or more monoesters represented by the formula (I), (II), (III) and (IV) as defined herein. The lubricating oil base stock has a high temperature high shear (HTHS) viscosity of less than about 1.7 cP as determined by ASTM D4683, and a Noack volatility from about 15 to about 90 percent as determined by ASTM D5800. A lubricating oil containing the lubricating oil base stock including one or more monoesters represented by the formula (I), (II), (III) and (IV) as defined herein. A method for improving one or more of thermal and oxidative stability, solubility and dispersancy of polar additives, deposit control and traction control in a lubricating oil by using as the lubricating oil a formulated oil containing the lubricating oil base stock including one or more monoesters represented by the formula (I), (II), (III) and (IV) as defined herein.

Provided is a refrigerator oil composition for a refrigerant containing an unsaturated fluorinated compound having a carbon-carbon unsaturated bond, which is represented by a general formula (I): C.sub.2F.sub.pR.sub.4-p, wherein R each independently represents a hydrogen atom, a chlorine atom, a bromine atom, or an iodine atom, and p represents an integer of 1 to 3. The composition contains a base oil (P) including one or more kinds selected from polyvinyl ethers, polyalkylene glycols, copolymers of a poly(oxy)alkylene glycol or a monoether thereof and polyvinyl ethers, and a polyol ester. The kinematic viscosity at 100 C. of the base oil (P) is 2.00 to 50.00 mm.sup.2/s, and the hydroxyl value thereof is 5.0 mgKOH/g or less. The refrigerator oil composition is excellent in compatibility with a refrigerant containing an unsaturated fluorinated compound having 2 carbon atoms and having a specific atom, and is also excellent in thermal stability.

Refrigeration lubricants with at least one thiophosphorus additive for use in hydrofluorocarbon refrigeration systems. The thiophosphorus additives may improve the stability and metals and/or refrigerant compatibility of the refrigeration lubricant.