Abstract
Abstract This paper is an analysis of fuel-oil and lubricating-oil economy based on the 1937 A.S.M.E. Oil-Engine Power Cost Report. Both analyses are divided into two sections, the factual and the interpretative parts. The nature of the factual analysis does not permit drawing any conclusion beyond the one that, in making more judicious use of graphical representations, the usefulness of the Cost Report can be greatly increased. Conclusions from the interpretative analysis are as follows: 1 Engine load has a great effect on both fuel- and lubricating-oil economy. 2 Engine type has a great effect on lubricating-oil economy and a small effect on fuel-oil economy. 3 Year of manufacture has a great effect on both fuel- and lubricating-oil economy. 4 In both cases the improvement is wholly due to advance in design and construction. 5 Engine size has practically no effect on either fuel- or lubricating-oil economy. 6 Engine speed has practically no effect on either fuel- or lubricating-oil economy. 7 Fuel gravity has practically no effect on fuel economy. 8 Other factors may have some small effect on fuel- and lubricating-oil economy but they have not been sufficiently investigated.
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