Abstract: A grease formulation containing a thickener and a Fischer-Tropsch derived base oil, in particular a heavy or extra heavy base oil. The use of a Fischer-Tropsch oil results in an increase in thickener concentration and in improved properties such as anti-wear and copper corrosion performance. Also provided is the use of a Fischer-Tropsch derived base oil in a grease formulation, for the purpose of improving its anti-wear and/or copper corrosion performance, and/or for reducing the concentration of an additive in the formulation.

Abstract: The present invention provides a process to prepare two or more base oils, which process at least comprises the following steps: a) providing two or more paraffinic hydrocarbon feedstock streams; b) subjecting a first paraffinic hydrocarbon feedstock stream provided in step a) to a hydrocracking/hydroisomerization step to obtain a first at least partially isomerised product stream; c) subjecting a second paraffinic hydrocarbon feedstock stream provided in step a) to a hydrocracking/hydroisomerization step to obtain a second at least partially isomerised product stream; d) separating the first product stream of step b), thereby obtaining a first lower boiling fraction and a first higher boiling fraction; e) separating the second product stream of step c), thereby obtaining a second lower boiling fraction and a second higher boiling fraction; f) combining the first lower boiling fraction of step d) with the second lower boiling fraction of step e) thereby obtaining a combined lower boiling fraction; g) combinin

Abstract: The present invention provides a process to prepare two or more base oils, which process at least comprises the following steps: (a) providing a paraffmic hydrocarbon feedstock stream; (b) subjecting a paraffmic hydrocarbon feedstock stream provided in step (a) to a hydrocracking/hydroisomerization step to obtain an at least partially isomerised product stream; (c) separating the product stream of step (b), thereby obtaining a lower boiling fraction and a higher boiling fraction; (d) dewaxing the lower boiling fraction of step (c) to obtain a light base oil; and (e) dewaxing the higher boiling fraction of step (c) to obtain a heavy base oil.

Abstract: The present invention provides a lubricating composition for use in the crankcase of an engine comprising a base oil and one or more additives, wherein the base oil comprises a Fischer-Tropsch derived base oil and wherein the lubricating composition has a kinematic viscosity at 100 C (according to ASTM D 445} of below 5.6 cSt and a Noack volatility (according to ASTM D 5800) of below 15 wt. %.

Abstract: A functional fluid composition comprising a naphthenic bright stock base oil and a Fischer-Tropsch derived base oil, wherein the functional fluid composition has a Viscosity Index (according to ASTM D 2270) of above 95.

Abstract: The present invention provides a process to prepare a residual base oil, which process at least comprises the following steps: (a) providing a mineral bright stock waxy raffinate; (b) combining the mineral bright stock waxy raffinate provided in step (a) with a catalytically dewaxed residual Fischer-Tropsch derived base oil to obtain a mixture; and (c) solvent dewaxing the mixture obtained in (b) to obtain a residual base oil, wherein the weight ratio of the mineral bright stock waxy raffinate to the catalytically dewaxed residual Fischer-Tropsch derived base oil in step (b) is in the range of from 75:25 to 35:65. In another aspect the present invention provides a residual base oil obtainable by the process.

Abstract: Use of a lubricating oil composition comprising at least one Fischer-Tropsch derived base oil for reducing exhaust port blocking of a 2-stroke engine. The present invention also relates to a 2-stroke lubricating engine oil composition comprising (i) at least one Fischer-Tropsch derived base oil having a kinematic viscosity at 100° C. in the range of from 2 to 30 mm2/s at 100° C. and (ii) 5 wt % or greater of a hydrocarbon solvent; wherein the lubricating engine oil composition has a Blocking Index of greater than 130 as measured by the JASO M343-92 Exhaust System Blocking Test Method.

Abstract: A process oil composition comprising: (i) from 50% to 99.9% by weight of de-asphalted cylinder oil (DACO); (ii) from 0.1% to 20% by weight of a Fischer-Tropsch derived base oil having a kinematic viscosity at 100° C. of not more than 4.0 mm2/s. The Fischer-Tropsch derived base oil is useful in a flux oil for de-asphalted cylinder oil. The process oil composition of the present invention is suitable for use as a process oil component in pneumatic tyres.

Abstract: The present invention provides an additive concentrate comprising: ? at least 90 wt. % of a Fischer-Tropsch derived base oil, based on the total weight of the additive concentrate; ? at least 3.0 wt. % of a viscosity modifier, based on the total weight of the additive concentrate; and ? less than 5.0 wt. % of a solvency booster, based on the total weight of the additive concentrate.

Abstract: The present invention provides a functional fluid composition comprising: a naphthenic bright stock base oil; and a Fischer-Tropsch derived base oil, wherein the functional fluid composition has a Viscosity Index (according to ASTM D 2270) of above 95.

Abstract: Base oil formulation containing (i) a Fischer-Tropsch derived light base oil and (ii) a Fischer-Tropsch derived gas oil. The formulation can be prepared by back-blending a Fischer-Tropsch derived light base oil with a Fischer-Tropsch derived gas oil, for instance derived from the same Fischer-Tropsch synthesis. Also provided is the use of a Fischer-Tropsch derived gas oil in a base oil formulation containing a Fischer-Tropsch derived light base oil, for the purpose of improving the cold flow properties of the formulation while maintaining its flash point above a desired target value, and/or for the purpose of reducing the concentration of a cold flow additive in the formulation, preferably with less of a reduction in the flash point of the formulation than theory would have predicted to occur due to the incorporation of the Fischer-Tropsch derived gas oil.

Abstract: The present invention provides a lubricating composition for use in the crankcase of an engine comprising a base oil and one or more additives, wherein the base oil comprises a Fischer-Tropsch derived base oil and wherein the lubricating composition has a kinematic viscosity at 100 C (according to ASTM D 445} of below 5.6 cSt and a Noack volatility (according to ASTM D 5800) of below 15 wt. %.

Abstract: Middle distillate fuel composition is provided containing (a) a middle distillate base fuel, in particular a diesel base fuel, and (b) a Fischer-Tropsch derived paraffinic base oil component with a viscosity of at least 8 mm2/s at 100° C. In component (b), the ratio of the percentage of epsilon methylene carbon atoms to the percentage of isopropyl carbon atoms is suitably 8.2 or below. Its pour point may be ?30° C. or lower. Also disclosed is the use of a Fischer-Tropsch derived paraffinic heavy base oil in a middle distillate fuel composition, for the purpose of improving the cold flow properties of the composition and/or for reducing the concentration of a cold flow or flow improver additive in the composition.

Abstract: The present invention relates to a lubricating base oil blend comprising (a) a mineral oil derived base oil having a saturates content of more than 90 wt %, a sulphur content of less than 0.03 wt % and a viscosity index of between 80-150, and (b) a paraffinic base oil component having a viscosity at 1000 C of from 7 to 30 cSt (7 to 30 mm2/s), wherein component (b) is an isomerised Fischer-Tropsch derived bottoms product having a ratio of percentage of recurring methylene carbons which are four or more carbons removed from an end group and a branch to the percentage of isopropyl carbon atoms, as determined by 13C-NMR, of below 8.2.

Abstract: The invention relates to a bright stock base oil blend comprising of a paraffinic base oil component having a viscosity at 100° C. of from 8 to 25 mm^/sec and a residual and de-asphalted oil component, and the use of said blend as part of a gear oil or a cylinder oil formulation, and other uses.

Abstract: The present invention relates to the use of a lubricant in a diesel engine equipped with a regenerable diesel particulate trap, wherein the lubricant comprises a base oil component having a paraffin content of greater than 80 wt % paraffins, a saturates content of greater than 98 wt %, and comprising a series of iso-paraffins having n, n+1, n+2, n+3 and n+4 carbon atoms, wherein n is between 15 and 40, and to a process for operating a diesel engine equipped with a diesel particulate trap, comprising lubricating the diesel engine with the lubricant.

Abstract: A grease formulation containing a thickener and a Fischer-Tropsch derived base oil, in particular a heavy or extra heavy base oil. The use of a Fischer-Tropsch oil results in an increase in thickener concentration and in improved properties such as anti-wear and copper corrosion performance. Also provided is the use of a Fischer-Tropsch derived base oil in a grease formulation, for the purpose of improving its anti-wear and/or copper corrosion performance, and/or for reducing the concentration of an additive in the formulation.

Abstract: Base oil formulation containing (i) a Fischer-Tropsch derived light base oil and (ii) a Fischer-Tropsch derived gas oil. The formulation can be prepared by back-blending a Fischer-Tropsch derived light base oil with a Fischer-Tropsch derived gas oil, for instance derived from the same Fischer-Tropsch synthesis. Also provided is the use of a Fischer-Tropsch derived gas oil in a base oil formulation containing a Fischer-Tropsch derived light base oil, for the purpose of improving the cold flow properties of the formulation whilst maintaining its flash point above a desired target value, and/or for the purpose of reducing the concentration of a cold flow additive in the formulation, preferably with less of a reduction in the flash point of the formulation than theory would have predicted to occur due to the incorporation of the Fischer-Tropsch derived gas oil.

Abstract: A lubricant composition having a base oil and one or more additives wherein the lubricant composition has a kinematic viscosity at 100° C. of more than 5.6 cSt; a cold cranking simulated dynamic viscosity at ?35° C. according to ASTM D 5293 of less than 6200 centiPoise (cP); and, a mini rotary viscosity test value of less than 60000 cP according to ASTM D 4684, wherein the base oil has been obtained from a waxy paraffinic Fischer-Tropsch synthesized hydrocarbon.

Abstract: The present invention relates to a lubricant composition having a sulphur content of from 0.01 to 0.3 wt. %, a phosphorus content of from 0.01 to 0.1 wt. % and a sulphated ash content of from 0.1 to 1.2 wt. %, based on the total weight of the lubricant composition, which comprises a base oil or base oil blend, wherein the lubricant composition has a kinematic viscosity at 100° C. of more than 5.0 mm2/s (cSt), a cold cranking simulated dynamic viscosity at ?15° C. according to ASTM D 5293 of less than 9500 mPas (cP) and a mini rotary viscosity test value of less than 60000 mPas at ?20° C. according to ASTM D 4684, and wherein the base oil or base oil blend comprises a continuous series of iso-paraffins having n, n+1, n+2, n+3 and n+4 carbon atoms. The invention relates further to the use of the lubricant composition, for the reduction of piston ring deposits in an internal combustion engine.