Abstract: The present disclosure relates to novel compositions of additives that result from mixing at least two thermoassociative and exchangeable copolymers and at least one compound for controlling the association of these two copolymers. A lubricant composition results from mixing at least one lubricating base oil, at least two thermoassociative and exchangeable copolymers and at least one compound for controlling the association of these two copolymers. The present disclosure also relates to a process for modulating the viscosity of a lubricant composition that results from mixing at least one lubricating base oil, at least two thermoassociative and exchangeable copolymers; as well as the use of a diol compound for modulating the viscosity of a lubricant composition.

Abstract: A composition results from the mixture of at least one lubricating oil, at least one statistical copolymer A1 , and at least one compound A2 including at least two boronic ester functions; the statistical copolymer A1 resulting from the copolymerisation of at least a first monomer M1 having diol functions and at least a second monomer M2 having a different chemical structure from that of the M1 monomer. The composition lubricates a mechanical part. The field is that of lubricants.

Abstract: The present disclosure concerns a lubricant composition including: at least one base oil; and at least two glycerol esters E1 and E2, ester E1 being an ester of glycerol and of a C12-C26 carboxylic acid and ester E2 being an ester of glycerol and of a C4-C10 carboxylic acid. The lubricant composition has good friction properties, and the use thereof promotes fuel savings.

Abstract: Disclosed is a star copolymer (C) including at least 10 wt. % of units derived from styrene monomer and including arms that include a statistical copolymer (EP) including ethylene units and propylene units, and the method for preparing same. Also disclosed is the use thereof in lubricating compositions, in particular for improving the viscosity index, to the lubricating compositions thus obtained and to the uses thereof.

Abstract: The present disclosure relates to novel compositions of additives that result from mixing at least two thermoassociative and exchangeable copolymers and at least one compound for controlling the association of these two copolymers. A lubricant composition results from mixing at least one lubricating base oil, at least two thermoassociative and exchangeable copolymers and at least one compound for controlling the association of these two copolymers. The present disclosure also relates to a process for modulating the viscosity of a lubricant composition that results from mixing at least one lubricating base oil, at least two thermoassociative and exchangeable copolymers; as well as the use of a diol compound for modulating the viscosity of a lubricant composition.

Abstract: A lubricant composition includes at least one branched polyglycerol ether, and more particularly at least one branched polyglycerol ether and at least one dispersant. A method for reducing fuel consumption of a vehicle utilizing a lubricant composition is also provided. Furthermore, a use of a branched polyglycerol ether as a friction modifier in a lubricant composition is disclosed.

Abstract: A composition results from the mixture of at least one lubricating oil, at least one statistical copolymer A1, and at least one compound A2 including at least two boronic ester functions; the statistical copolymer A1 resulting from the copolymerisation of at least a first monomer M1 having diol functions and at least a second monomer M2 having a different chemical structure from that of the M1 monomer. The composition lubricates a mechanical part. The field is that of lubricants.

Abstract: A lubricant composition includes at least one base oil, at least one organomolybdenum compound, at least one compound including a dithiophosphate group and at least one fatty triamine. The lubricant composition has good friction properties for both steel/steel contacts and steel/carbon coating contacts, as well as for carbon coating/carbon coating contacts, whilst retaining good anti-wear properties.

Abstract: A lubricant composition includes at least one branched polyglycerol ether, and more particularly at least one branched polyglycerol ether and at least one dispersant. A method for reducing fuel consumption of a vehicle utilizing a lubricant composition is also provided. Furthermore, a use of a branched polyglycerol ether as a friction modifier in a lubricant composition is disclosed.

Abstract: A lubricant composition includes at least one base oil and at least one amine compound. The lubricant composition simultaneously has good anti-wear and fuel economy properties as well as good antioxidant properties.

Abstract: The present disclosure concerns a lubricant composition including: at least one base oil; and at least two glycerol esters E1 and E2, ester E1 being an ester of glycerol and of a C12-C26 carboxylic acid and ester E2 being an ester of glycerol and of a C4-C10 carboxylic acid. The lubricant composition has good friction properties, and the use thereof promotes fuel savings.