Patent ID: 8703681

Claim:
A lubrication oil composition comprising (i) a base fluid stock comprising a mixture of poly(trimethylene ether) glycol (PO3G) that is a fluid at ambient temperature, and a carboxylic acid ester of a polytrimethylene ether glycol (PO3G ester) that is a fluid at ambient temperature; and (ii) one or more lube oil additives, wherein the mixture of PO3G and PO3G ester comprise at least 95 weight percent based on the weight of the lubrication oil composition, wherein the PO3G is prepared by the polycondensation of monomers comprising 1,3-propanediol in the presence of a sulfur-based acid catalyst, and wherein each of the PO3G and the PO3G ester are present at 25 weight percent or more based on the weight of the base fluid stock.