A Survey of the Mechanical Design Factors Affecting Engine Oil Consumption

This paper reviews the mechanical factors affecting oil consumption in four-cycle diesel and gasoline engines and the practical solutions achieved by design modifications. There is an abundance of information on specific aspects of oil consumption, and this paper attempts to combine them in a single comprehensive review. It is based on a synthesis of technical papers, augmented by discussion with engine manufacturers. The pertinent information is organized into six discrete chapters: (1) Piston Rings, (2) Piston Design, (3) Cylinder Bores, (4) Valve Guide Seals, (5) Crankshaft Seals, and (6) Material Selection for Seals and Gaskets.