This chart is designed to allow users to determine whether or not lubricants will have similar viscosities. If you are used to working with one set of standards and suddenly get another thrown at you, this chart can provide a point of reference. Just read it horizontally. For example, an ISO 680 lubricant will have similar viscosity to an AGMA Grade 8 or SAE 140 gear oil. For more information on how to use this chart please contact email@example.com.