On March 30, 1981, a symposium entitled "Chemistry of Engine Combustion Deposits" was held at the 181st American Chemical Society National Meeting in Atlanta, Georgia, under the sponsorship of the Petroleum Division. This book is an out growth of that symposium, including papers from all of the At 1 anta presentors, as we 11 as from others who were i nvi ted to contribute. Research on engine deposits has not been as "glamorous" as in the rel ated fossil fuel areas of petrol eum, coal, or oil shale, and publications in the field have been largely confined to combustion and automotive...