Shear Rheological Characterization of Motor Oils
- 1 January 1988
- journal article
- research article
- Published by Taylor & Francis in Tribology Transactions
- Vol. 31 (3) , 317-324
- https://doi.org/10.1080/10402008808981829
Abstract
Measurements of high pressure viscosity, traction coefficient, and EHD film thickness were performed on twelve commercial automotive engine oils, a reference oil, two unformulated base oils and two unformated base oil and polymer blends. An effective high shear rate inlet viscosity was calculated from film thickness and pressure viscosity coefficient. The difference between measured and effective viscosity is a function of the polymer type and concentration. Traction measurements did not discriminate mileage formulated oils from those not so designated.Keywords
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