The two degrees are ‘meets the specification’ and ‘OEM Approved’.
What it means when a lubricant ‘meets the specification’
The OEM (Original Equipment Manufacturer), in co-operation with an additive supplier and/or the lubricant manufacturer, publishes specifications for the lubricant or fluid to be used for a certain application.
This publication includes the specific tests and test limits and is used by additive suppliers and the lubricant manufacturers to blend the oil. Put otherwise, they have to determine and use the right combination of base oils and additives, so that the final product complies with the specification.
The result is a lubricant or fluid that ‘meets the specification’. But this doesn’t mean it is ‘OEM approved’ yet.