The present invention relates to a refrigerator oil containing (A) a mineral oil having a kinematic viscosity at 40 C. of 0.50 mm.sup.2/s or more and 8.00 mm.sup.2/s or less, (B) a polyphosphate ester-based compound, and (C) a dissolution aid for the component (B).

This invention relates to methods to reduce abnormal combustion events in the operation of an internal combustion engine comprising using a lubricating oil composition comprising/resulting from the admixing of: (i) base oil, (ii) detergent, preferably providing at least 800 ppm Mg and less than 500 ppm Ca; and (iii) abnormal combustion event inhibitor compound(s), preferably comprising at least one phosphorus containing compound providing greater than 0.12 mass % phosphorus; wherein: 1) the lubricating oil composition is a SAE 10W-X, SAE 5W-X or SAE 0W-X blend, where X is 8, 12, 16, 20, or 30; and 2) when the lubricating oil composition is combined with an 88 octane reference fuel, the combination completes at least 1 iteration of 175,000 cycles per iteration, as determined by Sequence IX Test, ASTM D829.

A method for improving oxidative stability of a lubricating oil in a diesel engine by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and at least one aminic antioxidant, at least one phenolic antioxidant, and at least one Group V base stock as minor components. The at least one aminic antioxidant is present in an amount from 0.1 to 2.5 wt. %, the at least one phenolic antioxidant is present in an amount from 0.5 to 5 wt. %, and the at least one Group V base stock is present in amount from 1 to 20 wt. %. Oxidative stability is improved in a diesel engine lubricated with the lubricating oil, as compared to oxidative stability achieved in a diesel engine lubricated with a lubricating oil containing a minor component other than specified antioxidants and Group V base stock.

The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF.sub.3I) for use in a heat exchange system, including air conditioning and refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-410A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-410A.

The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF.sub.3I) for use in a heat exchange system, including air conditioning and refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-410A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-410A.

The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF.sub.3I) for use in a heat exchange system, including air conditioning and refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-410A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-410A.

An oleaginous corrosion-resistant lubricating composition comprising at least one poly-alpha olefin synthetic oil and effective amounts of metal salts of sulfonic acids, metal salts of carboxylic acids, metal salts of mixtures of said sulfonic and carboxylic acids, alkylated aromatic stabilizers as solubility modifiers, pour-point depressants, at least one antioxidant, triazole deactivator compounds and fluoroacrylate copolymers.

An oleaginous corrosion-resistant lubricating composition comprising at least one poly-alpha olefin synthetic oil and effective amounts of metal salts of sulfonic acids, metal salts of carboxylic acids, metal salts of mixtures of said sulfonic and carboxylic acids, alkylated aromatic stabilizers as solubility modifiers, pour-point depressants, at least one antioxidant, triazole deactivator compounds and fluoroacrylate copolymers.

A composition comprising from about 40 weight percent to about 99.9 weight percent of at least one C.sub.1-c.sub.5 hydrofluorocarbon, from about 0.1 weight percent to about 50 weight percent of CF3I, and from about 0.1 weight percent to about 10 weight percent of at least one C.sub.1-c.sub.6 hydrocarbon and the use of these composition for in methods of the recharging of refrigeration systems.

A method for preparing a nano suspension lubricant comprises providing substantially spherical nano particles of size ranging from about less than 50 nanometers to about 100 nanometers. The method further comprises mixing the nano particles and a surfactant in about 1:1 ratio in a solvent to form a mixture. The solvent is evaporated from the mixture to obtain surface modified nano particles. The surface modified nano particles include the nano particles coated with the surfactant. The method comprises mixing the surface modified nano particles with a lubricating fluid to form the nano suspension lubricant, where the lubricating fluid comprises about 90% to 99% base oil and about 1% to 10% additives.