TBS Viscometer
(According to ASTM D4683, D6616)
(Equivalent to ASTM D4741, CEC L36-A-90)
The Viscosity-Dependent Fuel Efficiency
Index for Engine Oils"
Written by T.W. Selby, Savant, Inc., USA
- 13th International Colloquium Tribology, Technische Akademie
Esslingen, Ostfildern, Germany, January 15-17, 2002.
[Full Paper in Acrobat]
Abstract
An algorithm permitting the
determination of the viscosity-dependent power
loss in an automotive engine was generated. Using Tapered Bearing
Simulator Viscometer data at 100°C and 150°C from the Institute
of Materials Engine Oil Database, the new algorithm was applied to 1300
oils purchased in North America, Europe, and Asia in the years 1999 and
2000. When both the claimed "fuel efficient" oils and the oils
not
so marked were compared using the new algorithm, the results produced
reasonable
views of the fuel efficiency which could be expected from the oils of
these
three databases. The new algorithm has been termed the Fuel
Efficiency
Index.
An Appendix compares the Fuel Efficiency Indexes of all the averaged
individual North American SAE grades.
"Very High Shear Rate, High
Temperature
Viscosity Using the Automated Tapered Bearing Simulator-Viscometer"
Written by T.W. Selby, T.J. Tolton
- Technische Akademie Esslingen, 7th International
Colloquium, Automotive Lubrication, p.13.8-1. (January 16-18, 1990).
- Published in the Handbook of Tribology and
Lubrication
Vol. 6, entitled "Engine Oils and Automotive Lubrication", pp 470-490.
"The Tapered Bearing Simulator
- An Absolute Viscometer"
Written by T.W. Selby and D.A. Piasecki
- SAE Paper #830031 presented at the SAE
International
Congress and Exposition, Detroit, Michigan, February 28-March 4, 1983.
"High Shear Viscometry and Fuel
Efficiency"
Written by D.A. Piasecki and T.W. Selby
- SAE Paper #821224 presented at the 1982 SAE
International
Fuels and Lubricants Meeting and Exposition. October 18-21, 1982,
Toronto, Ontario Canada.
"High Shear Viscometry and Fuel
Efficiency"
Written by T.W. Selby and D.A. Piasecki
- SAE Paper #820510. Presented at the 1982 SAE
International
Congress and Exposition, February 22-26, 1982 Detroit, Michigan.
"Development and Performance of the Tapered
Bearing Simulator for High Shear, High Temperature Viscometry"
Written by D.A. Piasecki, T.W. Selby, and M.F.
Smith, Jr
- SAE Paper #811225 presented at October 19-22,
1981 SAE Fuels and Lubricants Meeting, Tulsa, Oklahoma.
savant@savantgroup.com
