It's not that easy. Each lubricant formulation has its own particular additive package that varies from manufacturer and oil type. There are also variances from batch to batch of the same product and over time the formulation of a product may change slightly. If you want to trend additive levels you must send in your new oils for spectrographic analysis and FTIR to identify the additive indicators in the spectrums and thenas you sample your equipment over time you can watch those indicators and trend the changes. Your new oil baseline must be kept current with samples of all new oil received sent in and your new oil baseline can be averaged and that average used to compare to your used oils.