Patent ID: 7150182

Claim:
A high throughput method for screening lubricating oil compositions, under program control, comprising the steps of: (a) providing a plurality of different lubricating oil composition samples comprising (i) a major amount of at least one base oil of lubricating viscosity and (ii) a minor amount of at least one lubricating oil additive; (b) measuring wear stability of each sample to provide wear stability data for each sample, wherein the wear stability is measured by a test selected from the group consisting of an extreme pressure wear test, hydrodynamic wear test, corrosive wear test and a combination thereof; (c) outputting the results of step (b); (d) systemizing the outputted results of step (c) of each of the extreme pressure, hydrodynamic and corrosive wear tests, thereby assembling a library of the outputted results associated with each of the plurality of lubricating oil compositions, wherein each one of the wear tests is selected to be indicative of performance of a selected part of or an entire running internal combustion engine; and (e) storing a reference value selected from desired operating conditions or statutory requirements and comparing the outputted results of at least one of the extreme pressure, hydrodynamic and corrosive wear tests of the plurality of lubricating oil compositions to the stored reference value in accordance with the program control.