Oil analysis is one of the most powerful predictive maintenance technologies for assessing lubricant condition, machine health, and wear before failures occur. This practical guide explains how to interpret oil properties, contamination, wear debris, and tribology data to improve equipment reliability, optimize lubrication programs, and reduce maintenance costs.Designed for maintenance engineers, reliability professionals, and condition monitoring practitioners, the book provides a step-by-step framework for building an effective oil analysis program. Featuring real industrial case studies, laboratory interpretation techniques, and practical diagnostic methods, it demonstrates how oil analysis can extend equipment life, prevent unexpected failures, and strengthen world-class asset management and reliability programs.