Abstract
IN THEIR PAPER BEFORE THE SOCIETY OF AUTOMOTIVE ENGINEERS at Detroit, in January, 1958, J. K. Patterson and W. E Waddey, of the Esso Research and Engineering Company, showed from comparison of results of field and engine tests that present diesel engine tests for approving engine oils are not always very reliable for predicting the field performance of oils in petrol engines. With these considerations, the engine cleanliness data from recent field tests carried out by the authors' laboratories in a variety of equipment under differing operating conditions, have been examined for a relationship with the deposits formed in laboratory Caterpillar diesel engine tests and these resuts were presented in their paper.
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