The Penn State Microoxidation Test has been adapted for use with mineral oil base stocks and fully formulated automotive crankcase oils. Tests under nitrogen and air atmospheres coupled with analyses using gel permeation chromatography (GPC) and clay column adsorption provide for a semiquantitative analysis of the products by elution time (apparent molecular size). This test procedure allows for primary and secondary oxidation reaction rate studies after substantial quantities of the lubricant have been oxidized. Time-temperature studies can show the effectiveness of base oil quality as well as effects contributed by additives. A general time-temperature equivalence in the range of 200 to 225°C has been demonstrated for a series of formulated engine oils. Microoxidation tests have been compared with III-C hot engine tests for a series of ASTM reference oils.
Adaptation of the Penn State Microoxidation Test for the Evaluation of Automotive Lubricants
Sae Technical Papers
1980 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1980
1980-10-01
Aufsatz (Konferenz)
Englisch
Adaptation of the Penn State Microoxidation Test for the Evaluation of Automotive Lubricants
Kraftfahrwesen | 1980
|Microoxidation Evaluation of Automotive Crankcase Oils
SAE Technical Papers | 1983
|Synthetic automotive lubricants
Kraftfahrwesen | 1987
|Protective automotive lubricants
Tema Archiv | 1992
|Online Contents | 2002