Published: Nov 2013
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Modern civilization is much more dependent on two essentials than is perceived by almost all of the world's population. Both involve lubricants and lubrication. The first is lubrication of all mechanical devices developed to undergird this civilization. The second is transportation of the vital components and peoples of this civilization. Both essentials are interlocked. It was thought to be of interest to this present symposium on viscosity and rheology of in-service fluids as they pertain to condition monitoring to view the behavior of engine oils in normal service. Initial studies of four engine oils both as fresh and after a normal drain interval of several thousand miles were made by high shear rate viscometry at 1.0 × 106 s−1 shear rate and 100°C and 150°C. In addition, elemental analyses of these fresh and used engine oils also were made to determine additive, contaminant, and wear content of the oils. Last, a special study of the fresh and used engine oils by applying gas chromatography in a somewhat different pattern gave interesting information on the influences of engines, driving patterns, engine condition, and lubricant response.
engine oil, viscosity, high shear rate, engine oil volatility, analysis of engine oil, tapered bearing simulator viscometer, used engine oil, gas chromatography
Selby, Theodore W.
Director, R&D, Savant, Inc., Midland, Michigan