An Investigation of Engine Oil Viscosity Loss in Passenger Car Service and Its Characterization

Paper #:
  • 922295

Published:
  • 1992-10-01
Citation:
Dancy, J., Alexander, D., Lindholm, S., and DiBerto, D., "An Investigation of Engine Oil Viscosity Loss in Passenger Car Service and Its Characterization," SAE Technical Paper 922295, 1992, https://doi.org/10.4271/922295.
Pages:
14
Abstract:
Engine oil viscosity loss was investigated in highway service and in ASTM D-3945 Procedure A (diesel injector) shear stability test. The six oils involved contained various viscosity index improvers and had D-3945 100°C kinematic viscosity losses ranging from low to high. The losses in service were highest for an oil with one of the lowest D-3945A viscosity losses. D-3945A also did not correlate with service using 150°C high shear viscosity losses. D-3945A shearing severity was modified over a wide range, but it still did not rank oils like highway service. Results indicate a need for a more meaningful viscosity-loss bench test.
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