ASTM D992

ASTM D992 is a standardized test method used to determine the viscosity of lubricating oils over a specific range, typically for engine oils and similar products. Viscosity measures how thick or thin a fluid is, affecting how it flows and lubricates machinery. This test helps manufacturers ensure their oils meet certain quality and performance standards by providing consistent viscosity measurements. It involves measuring the time it takes for a specific amount of oil to flow through a capillary tube under controlled temperature conditions. Accurate viscosity data supports appropriate oil formulation for optimal engine performance and protection.