"The Expanding Dimensions of High Shear Rate Viscometry"
Author: Theodore Selby
Presented at SAE International Powertrain, Fuels and Lubricants Congress, Shanghai, China - 2008.
Written by T.W. Selby, Savant, Inc. -- SAE International Powertrains, Fuels and Lubricants Congress, Shanghai, China, June 23-25, 2008; SAE 2008-01-1621.
Abstract: Viscometry has been closely associated with the lubricating properties of engine oils since the development of the reciprocating engine. With the advent of non-Newtonian multi-grade engine oils, a new dimension of viscometry was introduced - viscometry at high shear rates and high temperatures. In view of the importance of the critical hydrodynamic lubrication that engine oils provide - and the toll on engine efficiency that these oils extract - it was thought timely and practical to review the initiation and application of high shear rate engine oil viscometry and to discuss subsequent development.