Published: Jun 1974
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Two car fleet programs sponsored by the Institute of Petroleum (I.P.) were conducted on ten ASTM Reference Oils as part of an ASTM program to study methods of evaluating the shear stability characteristics of polymer containing oils. The results obtained from one fleet consisting of conventional cars, i.e., cars having separate oil charges for their engines and their gear boxes, agreed well with the average results from six U.S. car fleets. A second fleet, made up of cars having a common oil charge for the gear boxes and the engine crankcases, sheared the reference oils substantially more than the other fleets. Viscosity loss results from the second fleet correlated poorly with those from all shear stability bench tests and with results from the other fleets.
ASTM Committee D02,