Abstract: The present invention provides a compound as a cold flow improver for a fuel composition, said compound being an ester of (i) a polyol wherein the polyol is selected from at least pentaerythritol, polymers thereof and mixtures thereof; and (ii) a fatty acid oligomer, wherein the fatty acid oligomer has a degree of polymerisation from 2 to 7. The ester compound can be used for reducing, preventing or inhibiting cold filter plugging in a diesel engine.

Abstract: The present invention provides a fuel composition comprising: (a) a fuel; and (b) a polyglycerol ester of a fatty acid; wherein the polyglycerol composition used to form the polyglycerol ester of a fatty acid comprises a mixture of diglycerol in an amount of 11.0 to 34.0 weight % based on the combined weight of the polyglycerols; triglycerol in an amount of 9.5 to 24.5 weight % based on the combined weight of the polyglycerols; tetraglycerol in an amount of 6.0 to 21.0 weight % based on the combined weight of the polyglycerols; pentaglycerol in an amount of 3.5 to 19.0 weight % based on the combined weight of the polyglycerols; hexaglycerol in an amount of 6.0 to 13.5 weight % based on the combined weight of the polyglycerols; heptaglycerol in an amount of 5.0 to 13.0 weight % based on the combined weight of the polyglycerols; octaglycerol in an amount of 3.0 to 12.0 weight % based on the combined weight of the polyglycerols; nonaglycerol in an amount of 1.5 to 10.