The invention provides a fuel oil composition F) comprising F1) a fuel oil of mineral origin and F2) a fuel oil of vegetable and/or animal origin, and, as a cold additive, the constituents A) at least one copolymer composed of ethylene and 8-21 mol % of at least one acrylic or vinyl ester having a C1-C18-alkyl radical and B) at least one comb polymer containing structural units having C8-C16-alkyl radicals, the structural units being selected from C8-C16-alkyl (meth)acrylates, C8-C16-alkyl vinyl esters, C8-C16-alkyl vinyl ethers, C8-C16-alkyl(meth)acrylamides, C8-C16-alkyl allyl ethers and C8-C16-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 m1, m2, . . . mg are the molar fractions of the abovementioned monomers B) in the polymer, and the sum of the molar fractions m1 to mg=1, w1i, w1j. . . w2i, w2j. . . wgp 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 n1i, n1j. . . n2i, n2j. . . ngp are the chain lengths of the alkyl radicals i, j, . . . p of the monomers B) 1 to g.