Some Relationships Between the Viscometric Properties of Motor Oils and Performance in European Engines

JC Bell; MA Voisey

doi:10.1520/STP34808S

SYMPOSIA PAPER Published: 01 January 1977

STP34808S

Some Relationships Between the Viscometric Properties of Motor Oils and Performance in European Engines

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Piston ring wear, bearing wear and fuel consumption have been measured in European engines run under fully warmed-up conditions at steady speed and load. The engines were lubricated with motor oils which were formulated from a range of types and concentrations of VI improvers and base oil blends. The viscosities, viscosity/temperature relationships and viscosity/shear-rate characteristics of these formulations varied widely. The results for all the oils tested showed a poor correlation with their low shear-rate viscosities measured at 210°F or 150°C but a good correlation with their viscosities measured at shear rates of 10⁵ to 10⁶ sec⁻¹.

Author Information

Bell, JC

Voisey, MA

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Developed by Committee: D02

Pages: 71–82

DOI: 10.1520/STP34808S

ISBN-EB: 978-0-8031-4694-5

ISBN-13: 978-0-8031-0549-2

Some Relationships Between the Viscometric Properties of Motor Oils and Performance in European Engines

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