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A short review of the modern automobile and automotive lubricant histories is desirable to help evaluate the present status. The advent of cadmium-silver and copper-lead alloy bearings and the earliest compounded oils quickly indicated the need for some type of test to differentiate between oils that could safely be used with these bearings. In the foreground was also the necessity for an oil suitable for use in certain diesel engines. World War II accelerated the development of Ordnance Department specifications and methods of test that became known as 2104-B. Essentially, these specifications covered an oil that would (1) satisfactorily lubricate a diesel engine, and (2) resist bearing corrosion under heavy-duty conditions.
Moore, C. C.
Union Oil Co. of Calif., Brea, Calif.