The high temperature permanent and temporary viscosities of oils run in a diesel injector shear stability test were compared with similar data for two European laboratory engine tests. Low shear rate permanent viscosity losses for oils run in selected European cars were compared with laboratory data. Shear stability as commonly determined by the diesel injector test and low shear rate viscosity measurements does not permit adequate assessment of the shear stability of engine oils. The viscosities measured at high shear rates and high temperatures appear to provide a more useful dimension in the characterization of oils than do standard viscosity measurements. Temporary viscosity losses tend to be larger than permanent viscosity losses. (DePo)
Assessment of shear stability methods for european engine oils
Bewertung der Scherstabilitaetspruefungen fuer europaeische Motoroele
SAE-Papers ; 1-13
1979
13 Seiten, 5 Bilder, 12 Tabellen, 9 Quellen
Aufsatz (Konferenz)
Englisch
Assessment of Shear Stability Methods for European Engine Oils
Kraftfahrwesen | 1979
|Assessment of Shear Stability Methods for European Engine Oils
SAE Technical Papers | 1979
|A Bench Scale Engine Test for Shear Stability of Multigrade Engine Oils
SAE Technical Papers | 1973
|European test methods for fuel efficient engine oils
Kraftfahrwesen | 1984
|Predicting the Shear Stability of Multigrade Engine Oils from Bench Tests
SAE Technical Papers | 1975
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