abstract |
The invention relates to the field of lubricating compositions, in particular the fuel economy (FE) properties of the lubricating compositions. The invention relates to the combined use of at least one derivative of molybdenum and of at least one derivative of boron in order to preserve the fuel economy (FE) properties of a lubricating composition also comprising at least one base oil. The invention also relates to the use, within a lubricating composition also comprising at least one base oil, of a combination of at least one derivative of molybdenum and of at least one derivative of boron, and at least 30 ppm or at most 600 ppm of boron with respect to the weight of lubricating composition to preserve the fuel economy (FE) properties of this lubricating composition. |