Compositions And Methods Of Dispergating Paraffins In Sulphur-Low Fuel Oils

The fuel oil as claimed in one or more of claims 1 to 5, wherein the oil-soluble amine (B) is a primary, secondary or tertiary fatty amine.

A method of improving the low-temperature properties of a fuel oil having a sulfur content of less than 50 ppm, comprising a lubricity additive (C) selected from fatty acids, fatty acid partial esters of polyols and fatty acid amides of alkanolamides, by adding to the fuel oil a low-temperature additive comprising

• i. at least one oil-soluble amide-ammonium salt of a polycarboxylic acid with a mono- and/or dialkylamine (A) and
• ii. 5-100% by weight, based on the amount of amide-ammonium salt (A), of an oil-soluble amine (B),
• and wherein the fuel oil consists of a fuel of mineral origin, or a synthetic fuel obtainable by catalytic hydrodeoxygenation of vegetable oils and fats or of animal fats, or a synthetic fuel produced by means of Fischer-Tropsch synthesis or a mixture thereof.

A method of improving the response characteristics of a fuel oil comprising a lubricity additive (C) and having a sulfur content of less than 50 ppm on the addition of an amide-ammonium salt (A), characterized in that 5% to 100% by weight of an oil-soluble amine (B) is added to the fuel oil, based on the amide-ammonium salt (A), where the lubricity additive (C) is selected from the group consisting of fatty acids, fatty acid partial esters of polyols and fatty acid amide of alkanolamides, and where the fuel oil consists of a fuel of mineral origin, or a synthetic fuel obtainable by catalytic hydrodeoxygenation of vegetable oils and fats or of animal fats, or a synthetic fuel produced by means of Fischer-Tropsch synthesis or a mixture thereof.