The oxidation of a kerosene fuel and of a mixture of 3 hydrocarbons (79% n-undecane—10% n-propylcyclohexane—11% 1,2,4-trimethylbenzene) was studies in a jet-stirred flow reactor in the temperature range 873–1033 K at atmospheric pressure. The concentrations of molecular species were measured at different extents of reaction by gas chromatography. The reaction products formed during the oxidation of the kerosene and the ternary mixture were identical. The main hydrocarbon intermediates were ethylene, propene, methane, 1-butene, 1,3-butadiene and ethane. Several other unsaturated hydrocarbon were also detected as minor products: 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene and 1-dencene and also 1,3-pentadiene, cyclopentadiene, benzene, toluene and xylene. In both experiments, the concentration profiles of molecular species were very similar, indicating that the mixture of 3 hydrocarbons from C9 to C11 belonging to 3 different chemical families (n-alkanes, cyclanes and aromatics) is representative of the kerosene studied. On the basis of the experimental observation of a low concentration level for large hydrocarbon intermediates, quasi-global chemical kinetic reaction mechanisms were developed to reproduce the experimental data. These models involve a few global molecular reactions for the oxidation-pyrolysis of the initial fuel molecules and a detailed mechanism for the oxidation of the small intermediate hydrocarbons.