TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent selected from hydrocarbons, aromatic hydrocarbons, alcohols, ethers, nitrile, mineral spirits, bio-diesel fuel, and/or petroleum derived diesel fuel.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The pour-point depressant comprises at least one of a polyglycerol ester and polyester derived from polyglycerol polyols consisting of at least one of linear, branched, and cyclic polyglycerols which are from at least one of monoesterified, at least partially esterified, and completely esterified, and which are at least one of ester and hydroxyl terminated; polyglycerol esters of mixed fatty acids; polyglycerol polyricinoleate; and compound of formulae (I) or (II).n=1-100 (preferably 1-5);R1-R12=H; at least one of straight or branched alkyl, cycloalkyl, polycycloalkyl, heterocycloalkyl, aryl, alkaryl, aralkyl, alkoxy, alkenyl, or 1-100C alkynyl; or 1-100 silicon atom containing silyl or 1-100 silicon atom containing siloxyl; where the carbon or silicon atom linking group to, or part of, a least one functional groups selected from alcohols, thiols, thioethers, nitriles, nitro constituents, sulfoxides, sulfonates, phosphonium constituents, phosphonates, phosphonites, ammonium constituents, carbonyls, carbonates, carbamates, ketones, esters, amides, ethers, or amines (preferably H; straight or branched alkyl, cycloalkyl, polycycloalkyl, heterocycloalkyl, aryl, alkaryl, aralkyl, alkoxy, alkenyl, or 1-25C alkynyl);x1-x6=1-100 (preferably 1-15);andy1-y3=1-50 (preferably 1-5).Preferred Composition: The diesel fuel additive (C1) further comprises at least one of ethylene vinyl acetate and polyethylene vinyl acetate. A diesel fuel additive (C2) comprises at least one solvent; a first pour-point depressant; and a second pour-point depressant, where at least one of the first and second pour-point depressants comprises a polyglycerol ester. The first pour-point depressant comprises polyglycerol polyricinoleate, and the second pour-point depressant comprises polyglycerol esters of mixed fatty acids. EXAMPLE - A bio-diesel fuel additive comprising (wt.%) xylene (30), isopropanol (20), Coldflow 105 (RTM: pour-point depressant) (20), Drewpol PGPR (RTM: pour-point depressant) (10) and Drewpol 3-5-M (RTM: pour-point depressant) (20) was prepared.