One of the most important Predictive Maintenance practices. Oil analysis (OA) is the laboratory analysis of a lubricant's properties, suspended contaminants, and wear debris. OA is performed during routine predictive maintenance to provide meaningful and accurate information on lubricant and machine condition. Engefaz follows a number of different standard norms to make sure diagnostics are extremely accurate, such as ASTM D88; ISO 4406/99; ASTM D377; ASTM D92; among others.