A fuel oil composition F) comprising F1) a fuel oil of mineral origin and F2) more than 2 to 35% by volume of a fuel oil of vegetable and/or animal origin, and 0.001 to 5% by weight of a cold additive, comprising the constituents A and B in the weight ratio A:B = 20:1 to 1:20 A) at least one copolymer composed of ethylene and 8-21 mol% of at least one acrylic or vinyl ester having a C 1 -C 18 -alkyl radical and B) at least one comb polymer containing structural units composed of B1) at least one olefin as monomer 1 which bears at least one C 8 -C 18 alkyl radical on the olefinic double bond, and B2) at least one ethylenically unsaturated dicarboxylic acid as monomer 2 which bears at least one C 8 -C 16 alkyl radical bonded via an amide and/or imide moiety, where the molar ratio B1):B2) is between 1.5:1 and 1:1.5, where the sum Q Q = ∑ i w 1 ⁢ i ⋅ n 1 ⁢ i + ∑ j w 2 ⁢ j ⋅ n 2 ⁢ j of the molar averages of the carbon chain length distributions in the alkyl radicals of monomer 1 on the one hand and the alkyl radicals of the amide and/or imide groups of monomer 2 on the other is from 21.0 to 28.0, where w 1 is the molar proportion of the individual chain lengths in the alkyl radicals of monomer 1, w 2 is the molar proportion of the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2, n 1 are the individual chain lengths in the alkyl radicals of monomer 1, n 2 are the individual chain lengths in the alkyl radical of the amide and/or imide groups of monomer 2, i is the serial variable for the individual chain lengths in the alkyl radicals of monomer 1, and j is the serial variable for the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2. F1) a fuel oil of mineral origin and F2) more than 2 to 35% by volume of a fuel oil of vegetable and/or animal origin, and 0.001 to 5% by weight of a cold additive, comprising the constituents A and B in the weight ratio A:B = 20:1 to 1:20 A) at least one copolymer composed of ethylene and 8-21 mol% of at least one acrylic or vinyl ester having a C 1 -C 18 -alkyl radical and B) at least one comb polymer containing structural units composed of B1) at least one olefin as monomer 1 which bears at least one C 8 -C 18 alkyl radical on the olefinic double bond, and B2) at least one ethylenically unsaturated dicarboxylic acid as monomer 2 which bears at least one C 8 -C 16 alkyl radical bonded via an amide and/or imide moiety, where the molar ratio B1):B2) is between 1.5:1 and 1:1.5, B1) at least one olefin as monomer 1 which bears at least one C 8 -C 18 alkyl radical on the olefinic double bond, and B2) at least one ethylenically unsaturated dicarboxylic acid as monomer 2 which bears at least one C 8 -C 16 alkyl radical bonded via an amide and/or imide moiety, where the molar ratio B1):B2) is between 1.5:1 and 1:1.5, w 1 is the molar proportion of the individual chain lengths in the alkyl radicals of monomer 1, w 2 is the molar proportion of the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2, n 1 are the individual chain lengths in the alkyl radicals of monomer 1, n 2 are the individual chain lengths in the alkyl radical of the amide and/or imide groups of monomer 2, i is the serial variable for the individual chain lengths in the alkyl radicals of monomer 1, and j is the serial variable for the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2.