| abstract |
In accordance with the invention, it has been discovered that the performance of a functional fluid, such as a lubricant, can be improved by following a method of operating a functional fluid using device, such as an engine, comprising: supply-ing to the device a functional fluid composition comprising an additive package; operating the device containing the functional fluid composition; and adding to the functional fluid composition, during the operation of the device, a supplemental additive package; resulting in a performance improvement of the functional fluid composition during its service life and/or an extension of the functional fluid composition's service life, and so an improvement in the performance of the device. |