There is described a fuel composition incorporating levulinic acid or a functional derivative thereof.
There is described a fuel composition which is substantially free of alkanolamides, containing at least 95 % by volume of a hydrocarbon-based fuel and from 0.1 to 5 % by volume of an additive selected from the groups consisting of: a) the optionally alkoxylated linear or branched saturated or unsaturated monoalcolhols having 8 to 24 C atoms, containing zero or 1 to 20 mol of ethylene oxide and/or 1 to 5 mol of propylene oxide per mol of alcohol, or b) the polyols having 2 to 6 carbon atoms, optionally partially esterified with fatty acids having 12 to 24 carbon atoms, or c) the alkoxylated fatty acids having 12 to 24 carbon atoms and 4 to 20 mol of ethylene oxide per mol of fatty acid, or d) the ethoxylated dimeric fatty acids.
There is described a fuel composition which is substantially free of alkoxylated compounds and is substantially free of long-chain alkyl alcohols having at least 6 C atoms, and contains at least 95% by volume of a hydrocarbon-based fuel and 0.1 to 5% by volume of an additive of the formula (I); R--CO--NR.sup.1R.sup.2 (I) in which R is a saturated or unsaturated, linear or branched alkyl radical having 6 to 21 C atoms; and R.sup.1 and R.sup.2, which may be the same or different, each represent a hydroxyalkyl radical having 1 to 4 atoms.