Excerpt from The Journal of the Society of Automotive Engineers, Vol. 13: July, 1923 Laboratory work with the engine of the car in most general use was undertaken upon the completion of the road-tests. The results of the summer road-tests on the Speedway course are summarized in Figs. 2 and 3. The conclusions drawn from these results are (a) that under summer weather conditions the differences in fuel consumption obtained with the four test-fuels were much smaller than the differences in the estimated possible production of these test-fuels by current methods as indicated in Table 3, and (b) that the results were sensitive to small changes in carbureter adjustment. This sensitiveness is illustrated by the fact that, with a fixed adjustment, better economy was obtained with the less volatile fuels; whereas, when the carbureters were adjusted for each fuel, somewhat better economy was obtained with the more volatile fuels. The results of the road tests for crankcase dilution indicate that there was a greater rate of dilution with the less volatile fuels. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.