This book introduces the science and technology of materials in automotive engines. It focuses on reciprocating engines with particular emphasis on their characteristics and the materials used in their construction. The book considers the engine in terms of each specific part: the piston, cylinder, camshaft valves, crankshaft, connecting rod and catalytic converter. It covers the metallurgy, surface modification, wear resistance, and chemical composition of the materials considered and includes supplementary notes that support the text. The book will be essential reading for engineers and designers of engines students in the fields of combustion engineering, machine design, and materials science.