A method of improving the efficiency of an air conditioning and refrigeration system, comprising introducing a concentrate into the system which comprises introducing a concentrate into the compressor of the system, the concentrate comprising a a methylene-bis-(dibutyldithicarbamate), a calcium salt of dialkyl aromatic sulfonic acid, 3,5-di-tert-butyl-4-hydroxycinnaminic acid, C 7-9 branched alkyl ester, and nonylated phenylamine derivative; a novel additive consisting of introducing a concentrate into the compressor of the system, the concentrate comprising a a methylene-bis-(dibutyldithicarbamate), a calcium salt of dialkyl aromatic sulfonic acid, 3,5-di-tert-butyl-4-hydroxycinnaminic acid, C 7-9 branched alkyl ester, and nonylated phenylamine derivative, and an air conditioning system utilizing the polar compound containing a hydrogen phosphate group.