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, containing more than 4% by weight of esters of saturated fatty acids, and, as a cold additive, in an amount of from 0.001 to 5% by weight in the weight ratio A):B) = 10:1 to 1:10, the constituents 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 having C 8 -C 16 -alkyl radicals, the structural units being selected from C 8 -C 16 -alkyl (meth) acrylates, C 8 -C 16 -alkyl vinyl esters, C 8 -C 16 -alkyl vinyl ethers and C 8 -C 16 -alkyl (meth) - acrylamides, C 8 -C 16 -alkyl allyl ethers and C 8 -C 16 -alkyl diketenes, where the sum R R = m 1 ⋅ ∑ i w 1 ⁢ i ⋅ n 1 ⁢ i + m 2 ⋅ ∑ j w 2 ⁢ j ⋅ n 2 ⁢ j +....... m g ⋅ ∑ p w gp ⋅ n gp of the molar averages of the carbon chain length distributions in the alkyl radicals of the monomers B) is from 11.0 to 14.0, where m 1, m 2,... m g are the molar fractions of the abovementioned monomers B) in the polymer, and the sum of the molar fractions m 1 to m g = 1, w 1i, w 1j.. w 2i, w 2j... w gp are the proportions by weight of the individual chain lengths i, j, p of the alkyl radicals of the different monomers B) 1 to g, and n 1i, n 1j.. n 2i, n 2j...n gp are the chain lengths of the alkyl radicals i, j,.... p of the monomers B) 1 to g. 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, containing more than 4% by weight of esters of saturated fatty acids, and, as a cold additive, in an amount of from 0.001 to 5% by weight in the weight ratio A):B) = 10:1 to 1:10, the constituents 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 having C 8 -C 16 -alkyl radicals, the structural units being selected from C 8 -C 16 -alkyl (meth) acrylates, C 8 -C 16 -alkyl vinyl esters, C 8 -C 16 -alkyl vinyl ethers and C 8 -C 16 -alkyl (meth) - acrylamides, C 8 -C 16 -alkyl allyl ethers and C 8 -C 16 -alkyl diketenes, where the sum R R = m 1 ⋅ ∑ i w 1 ⁢ i ⋅ n 1 ⁢ i + m 2 ⋅ ∑ j w 2 ⁢ j ⋅ n 2 ⁢ j +....... m g ⋅ ∑ p w gp ⋅ n gp of the molar averages of the carbon chain length distributions in the alkyl radicals of the monomers B) is from 11.0 to 14.0, where m 1, m 2,... m g are the molar fractions of the abovementioned monomers B) in the polymer, and the sum of the molar fractions m 1 to m g = 1, w 1i, w 1j.. w 2i, w 2j... w gp are the proportions by weight of the individual chain lengths i, j, p of the alkyl radicals of the different monomers B) 1 to g, and n 1i, n 1j.. n 2i, n 2j...n gp are the chain lengths of the alkyl radicals i, j,.... p of the monomers B) 1 to g. 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 having C 8 -C 16 -alkyl radicals, the structural units being selected from C 8 -C 16 -alkyl (meth) acrylates, C 8 -C 16 -alkyl vinyl esters, C 8 -C 16 -alkyl vinyl ethers and C 8 -C 16 -alkyl (meth) - acrylamides, C 8 -C 16 -alkyl allyl ethers and C 8 -C 16 -alkyl diketenes,