TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The combination of additive with the biodiesel fuel or diesel/biodiesel blend at less than 3.5 pts. wt. of additive has a cold filter plugging point (CFPP). The CFPP is reduced by greater than or equal to 2 degrees C relative to the biodiesel or diesel biodiesel blend without the additive. The biodiesel comprises an animal derived biodiesel, or tallow and lard. The biodiesel includes plant derived biodiesel. The pts. wt. ratio of the polymer to saccharide ester(s) is 5:1-20:1. Only one saccharide ester is present. The saccharide ester comprises saturated ester group(s) and unsaturated ester group(s). The additive includes first saccharide ester comprising saturated ester group(s) and a second saccharide ester comprising unsaturated ester group(s). The first and/or second saccharide esters have average of 3-7 ester groups per molecule. The polymer is a maleic anhydride derived copolymer, preferably maleic anhydride/acrylate ester/methacrylate ester derived terpolymer. The polymer comprises side chains derived from lauric acid, and/or side chains derived from stearic acid. The saccharide ester(s) is disaccharide ester particularly sucrose ester. The sucrose ester is sucrose myristate oleate mixed ester. The first saccharide ester is sucrose myristate. The second saccharide ester is sucrose oleate. The ratio of saturated esters to unsaturated esters is 2:1 on weight or molar basis. The length of carbon chain is ester group of saccharide ester(s) and/or length of side chain of polymer is matched to the length of the carbon chain in biodiesel. The additive comprises sucrose myristate, sucrose oleate, and terpolymer of maleic anhydride, lauryl acrylate, and stearyl methacrylate at molar ratio of 1:2:0.5. The molar ratio of sucrose myristate to sucrose oleate is 2:1. The weight ratio of sucrose myristate and sucrose oleate to terpolymer of maleic anhydride, lauryl acrylate, and stearyl methacrylate is 1:10. The additive is present in the biodiesel fuel or diesel/biodiesel blend at less than 3.5 pts. wt. The CFPP of the biodiesel or diesel/biodiesel blend is reduced by greater than or equal to 2 degrees C relative to the biodiesel or diesel/biodiesel blend without the additive. EXAMPLE - An additive comprising maleic anhydride, lauryl acrylate, stearyl methacrylate, and sucrose surfactants was prepared. The ratio of maleic anhydride, lauryl acrylate, stearyl methacrylate is 1:2:0.5. The sucrose surfactants were sucrose oleate (166.25 g) and sucrose myristate (333.45 g) at ratio of 2:1. The polymer (9.5 kg) to surfactant ratio is 1:0.1. A 50% reduction in lauryl acrylate component yielded the best cloud point (CP) and cold filter plugging point (CFPP) results. The cloud point was increased by changing the internal monomer ratios. The optimum ratio of polymers to esters is 1:0.1-1:0.5.