Abstract: There is disclosed a fuel composition comprising (a) a major amount of a middle distillate fuel comprising from about 0.5% to about 30% by weight fatty acid methyl esters, relative to the total amount of the fuel composition; and (b) a minor amount of an additive composition comprising an antioxidant system comprising at least one cyclic amine antioxidant and at least one phenolic antioxidant, and at least one ashless dispersant, wherein said fuel composition demonstrates reduced sediment formation as compared to a fuel composition devoid of the additive composition, and methods of use thereof.

Abstract: There is disclosed a fuel composition comprising (a) a major amount of a middle distillate fuel comprising from about 0.5% to about 30% by weight fatty acid methyl esters, relative to the total amount of the fuel composition; and (b) a minor amount of an additive composition comprising an antioxidant system comprising at least one cyclic amine antioxidant and at least one phenolic antioxidant, and at least one ashless dispersant, wherein said fuel composition demonstrates reduced sediment formation as compared to a fuel composition devoid of the additive composition, and methods of use thereof.

Abstract: Provided herein is a diesel fuel additive composition comprising cerium oxide nanoparticles, optionally a manganese compound, a detergent, and a demulsifier. In one embodiment, the demulsifier has relatively low phosphorus concentration to thereby improve the solubility of the components and the thermal stability and clarity of the resulting diesel fuel. Also provided are methods for improving fuel economy, reducing smoke production, inhibiting deposition of sludge, and improved storage stability.