The solubility of hydrogen in a straight run gasoil is measured using a chromatographic method, which is first validated with a known organic liquid (cyclohexane). Under the experimental conditions (up to 4 MPa, temperatures from 298 to 675 K), these results are best described by Chao-Seader and improved Zudkevitch-Joffe (with adjustment parameter b(0) = 0.6) models. Henry's law constant is determined at four temperatures.