A fuel composition comprises humins and at least one organic oxygenated solvent which has an apparent viscosity of at most 1.5 Pa·s at 100° C. at a shear rate of 30 s−1. Humins are produced by the dehydration of carbohydrates. The organic oxygenated solvent is selected from the group consisting of alcohols, ethers, aldehydes, ketones, acids, esters, which may be aromatic, cycloaliphatic and aliphatic, and mixtures thereof. The fuel compositions can be used as marine fuel.