Hi to all. In the IE02 t-code we have the fields primary fuel, secundary fuel and oil type, I would like to know what is the business difference between them, because I know that primary and secundary fuel refers to the equipament engine uses to work for example ethanol and gasoline for brazilian dual fuel egines cars, but what is the oil type? Is it a oil that vehicle burns in its engine to work (for pickup and truck vehicles) or the oil that vehicle uses in the engine lubrication system? All those fields brings uses the same master data source.
The image below brings the fields that I am refering to in IE02 t-code:

Thanks best regards.