Today I changed the engine oil and filter, changed the transmission oil, drained the differential (don't have enough oil to fill it back up
), and replaced my drain plug with a Fumoto drain valve. I used Motul for all fluids and a new OEM Subaru oil filter.
Replacing the engine oil/filter was kind of pointless since the dealer probably changed it when the car was traded in, but there was no mention of any fluids being replaced in any of the documents I received with the car, and if it's not on paper, then it was never done. I'm glad I changed the transmission oil since it definitely seemed like it was original to the car. It was thick/gooey, had a strange silver color to it, and smelled very strong. Draining the differential was also kind of pointless since the oil looked almost brand new as it was draining.