Abstract: Gasoline fuel composition suitable for use in an internal combustion engine comprising: (a) Fischer-Tropsch derived naphtha at a level from 2 to 20% v/v; (b) at least one aromatic octane booster present at a level of 0.75 to 8% v/v or less; and (c) a gasoline base fuel; wherein the gasoline fuel composition comprises 40% v/v or less of aromatics. In a preferred embodiment, the Research Octane Number (RON) of the gasoline fuel composition is increased while maintaining the aromatic content of the gasoline fuel composition at a level of 40% v/v or less, based on the gasoline fuel composition.

Abstract: Diesel fuel composition suitable for use in an internal combustion engine comprising: (a) 2 mass % to 30 mass % of kerosene having a kinematic viscosity at 40° C. of 1.5 mm2/s or less and a density of 810 kg/m3 or less; (b) 2 mass % to 20 mass % of Fischer-Tropsch derived base oil having a kinematic viscosity at 40° C. of 7.5 mm2/s or greater and a density of 790 kg/m3 or greater; and (c) diesel base fuel. The diesel fuel composition of the present invention provides improved cold flow properties while simultaneously maintaining other properties such as viscosity and density within diesel fuel specification requirements.

Abstract: Gasoline fuel composition suitable for use in an internal combustion engine comprising: (a) Fischer-Tropsch derived naphtha at a level from 2 to 20% v/v; (b) at least one aromatic octane booster present at a level of 0.75 to 8% v/v or less; and (c) a gasoline base fuel; wherein the gasoline fuel composition comprises 40% v/v or less of aromatics. In a preferred embodiment, the Research Octane Number (RON) of the gasoline fuel composition is increased while maintaining the aromatic content of the gasoline fuel composition at a level of 40% v/v or less, based on the gasoline fuel composition.

Abstract: Diesel fuel composition suitable for use in an internal combustion engine comprising: (a) 2 mass % to 30 mass % of kerosene having a kinematic viscosity at 40° C. of 1.5 mm2/s or less and a density of 810 kg/m3 or less; (b) 2 mass % to 20 mass % of Fischer-Tropsch derived base oil having a kinematic viscosity at 40° C. of 7.5 mm2/s or greater and a density of 790 kg/m3 or greater; and (c) diesel base fuel. The diesel fuel composition of the present invention provides improved cold flow properties while simultaneously maintaining other properties such as viscosity and density within diesel fuel specification requirements.

Abstract: A composition having a density at 15° C. of between 820 and 845 kg/m3 and a cetane number of equal or greater than 40, which composition has been obtained by blending the following components: (a) a cracked gas oil, (b) a mineral derived gas oil other than (a), and (c) a Fischer-Tropsch derived kerosene fraction; and the use of this composition as an automotive gas oil fuel composition.

Abstract: Process to blend a mineral derived hydrocarbon product and a Fischer-Tropsch derived hydrocarbon product by providing in a storage vessel of a marine vessel a quantity of mineral derived hydrocarbon product and Fischer-Tropsch derived hydrocarbon product such that initially the mineral derived hydrocarbon product is located substantially above the Fischer-Tropsch derived hydrocarbon product, transporting the combined products in the marine vessel from one location to another location, also referred to as the destination, and obtaining a blended product at arrival of the marine vessel at its destination.

Abstract: A fuel composition useful for operating a jet engine or a diesel engine containing a petroleum derived kerosene fuel and a Fischer-Tropsch derived kerosene fuel is provided. The Fischer-Tropsch derived kerosene fuel contains normal and iso-paraffins in a weight ratio of greater than 1:1 and/or the freeze point of the composition is lower than the freeze points of both of the petroleum derived kerosene fuel and the Fischer-Tropsch derived kerosene fuel.

Abstract: Process to blend a mineral derived hydrocarbon product and a Fischer-Tropsch derived hydrocarbon product by providing in a storage vessel of a marine vessel a quantity of mineral derived hydrocarbon product and Fischer-Tropsch derived hydrocarbon product such that initially the mineral derived hydrocarbon product is located substantially above the Fischer-Tropsch derived hydrocarbon product, transporting the combined products in the marine vessel from one location to another location, also referred to as the destination, and obtaining a blended product at arrival of the marine vessel at its destination.

Abstract: Use of a Fischer-Tropsch derived fuel component, in a fuel composition, is provided reducing the tendency of the composition to dissolve metals; increasing its thermal stability; reducing the concentration of a metal deactivator, antioxidant or detergent additive in the composition; or increasing the storage stability of the composition. The composition is preferably a diesel fuel composition.