A large number of studies have been published on the low temperature pumpability characteristics of fresh oils; however, less is known about the effects of oil aging on this property. In laboratory viscometric tests, fuel dilution, mechanical shearing, oxidative degradation and oil contaminants were all shown to significantly affect low temperature fluidity of multigrade engine oil formulations sensitive to slow cool gelation. Moreover, the cooling and shear rate applied to the test oil was found to play an important role in the overall impact of these factors. For example, fuel dilution may improve cold cranking viscosity while degrading slow-cool MRV performance. These laboratory viscometric studies have been supplemented by full scale All-Weather Chassis Dynamometer testing comparing the pumpability performance of new and used SAE 10W-30 engine oils.


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    Title :

    Factors Affecting the Low Temperature Pumpability of Used Engine Oils


    Additional title:

    Sae Technical Papers


    Contributors:
    May, C. J. (author) / Habeeb, J. J. (author)

    Conference:

    1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1987



    Publication date :

    1987-11-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Factors affecting the low temperature pumpability of used engine oils

    May,C.J. / Habeeb,J.J. / Esso Petroleum Canada,CA | Automotive engineering | 1987


    Low Temperature Pumpability of Engine Oils

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    Some Factors Affecting the Cold Pumpability of Crankcase Oils

    Spohn, C. R. / Stewart, R. M. | SAE Technical Papers | 1972


    Low Temperature Pumpability of Engine oils

    Stambaugh, R.L. | SAE Technical Papers | 1984


    Pumpability of Multigrade Engine Oils at Low Temperature

    Graham, J. P. / Smith,, M. F. | SAE Technical Papers | 1971