TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The fuel composition is at least 80 wt.% of biodiesel fuel. The biodiesel fuel comprises fatty acid esters derived from monovalent alcohols containing 1-4 carbon atoms. The monoester is a methyl ester. The fuel includes at least 6 wt.% of palmitic acid methyl ester and/or stearic acid methyl ester. The biodiesel fuel includes at least 35 wt.% of saturated fatty acid esters containing at least 16 carbon atoms in the fatty acid residue. The biodiesel fuel is derived from palm oil, soy oil, Jatropha oil or animal tallow, preferably cattle, chickens or pork fat. The fuel composition includes at least one additive. The additive is dispersants, demulsifiers, defoamer, lubricating additives, antioxidants, cetane number improver, detergents, dyes, corrosion inhibitors and/or perfumes.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer is polyalkyl methacrylates, polyalkyl fumarate and/or polyalkyl maleate. The polymer includes 40-70 wt.% of ester group units that are derived from ester monomers having 16-40 carbon atoms in the alcohol residue. The polymer includes 30-60 wt.% of ester group units that are derived from ester monomers having 7-15 carbon atoms in the alcohol residue. The fuel composition contains 0.1-1 wt.% of polymer having ester groups. The fuel composition contains not more than 0.05 wt.% of ethylene copolymer. The weight ratio of recurrent units derived from ester monomers with 7-15 carbon atoms in the alcohol residue to recurrent units derived from ester monomers with 16-40 carbon atoms in the alcohol residue is 1:1-1:3. Preferred Method: The polymer is obtained by the polymerization of a monomer including 0-40 wt.% of at least one ethylenically unsaturated ester compound of formula (R3-C(R2)=CH(R)-C(=O)-OR1) (I), 10-98 wt.% of at least one ethylenically unsaturated ester compound of formula (R6-C(R5)=CH(R)-C(=O)-OR4) (II) and 0.1-80 wt.% of at least one ethylenically unsaturated ester compound of formula (R9-C(R8)=CH(R)-C(=O)-OR7) (III).R = H or CH3;R1 = 1-6C alkyl;R2, R3 = H or COOR10;R10 = H or 1-6C alkyl;R4 = 7-15C alkyl;R5, R6 = H or COOR11;R11 = H or 7-15C alkyl;R7 = 16-40C alkyl;R8, R9 = H or COOR12; andR12 = H or 16-40C alkyl. EXAMPLE - No suitable example given.