Modified Reciprocating Viscometer Predicts High Temperature Cranking Properties of Engine Oils 690769
A reciprocating viscometer which was used for determining cold-cranking properties of engine oils was modified so it could be used to predict low-speed, hot-cranking properties of crankcase oils in full-scale engines. Since the current 210 F ASTM D 445 viscosities of multigrade oils fail to predict their hot-cranking properties, there is need for such a unit. A high degree of correlation was obtained between the 210 F viscosities determined with the modified reciprocating viscometer and those determined using a full-scale test engine for a group of V.I. improved oils and a group of commercial premium multigrade crankcase oils. The correlation obtained between the two units for a group of 5W oils containing oiliness agents indicates the viscometer to be satisfactory for screening tests. In general, this viscometer can satisfactorily predict low-speed, hot-cranking properties of oils in full-scale engines quickly and economically.
Citation: Stewart, R. and Spohn, C., "Modified Reciprocating Viscometer Predicts High Temperature Cranking Properties of Engine Oils," SAE Technical Paper 690769, 1969, https://doi.org/10.4271/690769. Download Citation
Author(s):
R. M. Stewart, C. R. Spohn
Affiliated:
Gulf Research and Development Co.
Pages: 13
Event:
National Fuels and Lubricants and Transportation Meetings
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1969 Transactions-V78-A
Related Topics:
Crankcases
SAE MOBILUS
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