Patent ID: 8147567

Claim:
An enhanced biodiesel fuel composition comprising: a) an ester-based biodiesel component; and b) a functionalized ester component comprising functionalized ester species having the general formula: wherein R 1 is selected from the group consisting of C1 to C3 alkyl moieties; wherein R 2 and R 3 are independently selected from the group consisting of C1 to C10 alkyl moieties, C1 to C10 alkenyl moieties, and combinations thereof; wherein R 4 is selected from the group consisting of C2 to C20 alkyl moieties and C2 to C20 alkenyl moieties; wherein R 5 is selected from the group consisting of —H, hydroxyl, and C2 to C20 ester-forming carboxylate functional moieties; and wherein the functionalized ester species amount to at least about 0.1 weight percent of the enhanced biodiesel fuel.