Context of The relationship between engine oil viscosity and engine performance, symposium collected and collated by R. M. Stewart T. W. Selby ; symposium chairmen T. F. Lonstrup, P. A. Bennett, M. L. McMillan, W. E. Waddey ; sponsored by Society of Automotive Engineers, Inc. and American Society for Testing and Materials ; presented at SAE International Automotive Engineering Congress and Exposition Detroit, Michigan February 28 - March 4, 1977, (electronic book)