Patent ID: 8372301

Claim:
A composition comprising a combination of an estolide base oil and at least one amine antioxidant, said combination having a time of at least 1000 minutes when tested in a rotating pressurized vessel oxidation test using ASTM Method 2272-11, wherein the estolide base oil has an acid value equal to or less than 0.2 mg KOH/g, and comprises at least one estolide compound selected from compounds of Formula I: wherein x is, independently for each occurrence, an integer selected from 0 to 20; y is, independently for each occurrence, an integer selected from 0 to 20; n is an integer greater than or equal to 0; R 1 is an optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R 2 is an optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched, wherein each fatty acid chain residue of said at least one estolide compound is independently optionally substituted.