A lubricating oil composition for an internal combustion engine including: (A) a lubricant base oil having a kinematic viscosity at 100 C. of 2 to 8 mm.sup.2/s and having an aromatic content of no more than 10 mass %; (B) a metallic detergent including: (B1) a metallic detergent overbased with calcium carbonate; and (B2) a metallic detergent overbased with magnesium carbonate; and (C) a molybdenum sulfide dithiocarbamate or a molybdenum oxysulfide dithiocarbamate, wherein the composition has, on the basis of the total mass of the composition, a calcium content of no more than 1500 mass ppm, a magnesium content of no less than 300 mass ppm, and a molybdenum content of no less than 600 mass ppm; and the composition has an HTHS viscosity at 150 C. of no more than 2.7 mPa.Math.s.

An automatic transmission fluid contains: a base oil: a component (A) that is two or more succinimides each having an alkenyl group or an alkyl group, wherein a mass average molecular weight of the alkenyl group or the alkyl group is different in each of the succinimides; a component (B) that is a primary amine having a carbon chain having 12 to 24 carbon atoms; a component (C) that is an aliphatic amine alkylene oxide adduct having a carbon chain having 12 to 20 carbon atoms; and a component (D) that is an amide compound.

The present invention relates to a lubricant and/or clean-out composition comprising: (a) a dispersant component comprising a succinimide dispersant and/or a quaternary ammonium salt dispersant; (b) a carrier fluid component; and (c) an optional corrosion inhibitor, as well as methods of cleaning out deposits in a lubricant system, such as a hydraulic system, using such compositions.

The present invention relates to functional fluid compositions containing friction modifiers, and specifically stable compositions containing friction modifiers with limited solubility in and/or limited compatibility with the functional fluids with which they are used. In particular the present invention deals with functional fluids used in internal combustion engines, such as engine oils, and friction modifiers that contain one or more amide functional groups, where the friction modifier is present in the functional fluid composition at levels that would otherwise cause the composition to be unstable and/or hazy.

The present invention relates to functional fluid compositions containing friction modifiers, and specifically stable compositions containing friction modifiers with limited solubility in and/or limited compatibility with the functional fluids with which they are used. In particular the present invention deals with functional fluids used in internal combustion engines, such as engine oils, and friction modifiers that contain one or more amide functional groups, where the friction modifier is present in the functional fluid composition at levels that would otherwise cause the composition to be unstable and/or hazy.

This invention relates to a lubricating oil composition comprising or resulting from the admixing of: (i) at least 50 mass %, based upon the weight of the lubricating oil composition, of base oil, (ii) at least one capped dispersant having number average molecular weight (Mn) of less than 1600 g/mol, (iii) at least one magnesium containing detergent, (iv) at least one calcium containing detergent, (v) at least one copolymer viscosity modifier that has: 1) a ratio of relative KV140/relative KV20 of 1.9 or more; 2) a ratio of relative KV100/relative KV70 or 1.30 or more; and 3) a viscosity index (ASTM 2270D) of 320 or more, when 1), 2) and 3) are measured on blend, having a KV100 of about 8 cSt, of the copolymer viscosity modifier and a group III base oil having a KV100 (ASTM D445) of about 4 cSt and a viscosity index (ASTM D2270) of about 120.

This invention relates to a lubricating oil composition comprising or resulting from the admixing of: (i) at least 50 mass %, based upon the weight of the lubricating oil composition, of base oil, (ii) at least one capped dispersant having number average molecular weight (Mn) of less than 1600 g/mol, (iii) at least one magnesium containing detergent, (iv) at least one calcium containing detergent, (v) at least one copolymer viscosity modifier that has: 1) a ratio of relative KV140/relative KV20 of 1.9 or more; 2) a ratio of relative KV100/relative KV70 or 1.30 or more; and 3) a viscosity index (ASTM 2270D) of 320 or more, when 1), 2) and 3) are measured on blend, having a KV100 of about 8 cSt, of the copolymer viscosity modifier and a group III base oil having a KV100 (ASTM D445) of about 4 cSt and a viscosity index (ASTM D2270) of about 120.

The present invention relates to functional fluid compositions containing friction modifiers, and specifically stable compositions containing friction modifiers with limited solubility in and/or limited compatibility with the functional fluids with which they are used. In particular the present invention deals with functional fluids used in internal combustion engines, such as engine oils, and friction modifiers derived from hydroxy-carboxylic acids, where the friction modifier is present in the functional fluid composition at levels that would otherwise cause the composition to be unstable and/or hazy.

The present invention relates to functional fluid compositions containing friction modifiers, and specifically stable compositions containing friction modifiers with limited solubility in and/or limited compatibility with the functional fluids with which they are used. In particular the present invention deals with functional fluids used in internal combustion engines, such as engine oils, and friction modifiers derived from hydroxy-carboxylic acids, where the friction modifier is present in the functional fluid composition at levels that would otherwise cause the composition to be unstable and/or hazy.