The viscosity change of multigrade motor oils in service has been evaluated in a fleet representative of the present European car population. The evaluation covered air- and water-cooled engines, with conventional and integral gearboxes, and displacements ranging from 500-1750 cc.The effect of car, service, average ambient temperature, and type of polymer on the viscosity change of a lubricant has been estimated.The multigrade test oils have also been run in injector and bench engine tests in order to compare field testing results with laboratory techniques being developed.


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    Title :

    Prediction of Viscosity Stability of Multigrade Engine Oils in Service


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Automobile Engineering and Manufacturing Meeting ; 1974



    Publication date :

    1974-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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