A Simple High Shear Viscometer-Aspects of Correlation with Engine Performance

Abstract

<div class="htmlview paragraph">A simple rotary viscometer has been constructed in which multi-grade oils can be tested at temperatures up to 150°C and at shear rates of up to 4 × 10<sup>5</sup> s<sup>-1</sup>. Correlation has been made using this apparatus between multi-grade oil shear stability and engine bearing and cylinder bore wear. However, additional tests demonstrated that the chemical action of anti-wear additives also has a major influence on cylinder bore wear.</div>