Patent ID: 8476210

Claim:
A composition of compressor working fluid comprising: a dissolved gas or a condensate from a dissolved gas in a dilution amount at least 5% by weight; and a base fluid including at least a first base stock and a second base stock, wherein the viscosity difference between said first base stock and said second base stock is greater than 125 cSt, Kv 100° C.; wherein said base fluid is chosen from the group consisting of said first base stock being a synthetic polyalphaolefin (PAO) with a viscosity less than 10 cSt and greater than 2 cSt, Kv 100° C. with said second base stock being a synthetic polyalphaolefin with a viscosity greater than 135 cSt, Kv 100° C., said first base stock being a polyglycol or polyalkylene glycol with a viscosity less than 15 cSt and greater than 2 cSt, Kv 100° C. and said second base stock being a polyglycol or polyalkylene glycol with a viscosity greater than 135 cSt, Kv 100° C., and said first and second based stocks being comprised of two polyol esters.