THE IMPORTANCE OF VISCOSITY
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Abstract
ALTHOUGH the physical and chemical properties of lubricating oils have been significantly improved since World War II there is no indication that these improvements have led to a reduction of wear rates in engines and other mechanical equipment. Automobile crankcases are cleaner and ring sticking something of a rarity nowadays, while oil circulation has been improved. It was reasonable to expect that the last‐named benefit would lead to a reduction of wear due to cold‐starting, but the rate of wear continues at much the same rate as before World War II. One asks : have the benefits been commensurate with the expenditure on lubricant research? As a corollary comes the question : has research been directed to the right channels?