EVs have gears and gear oil in their drive units. There is a reduction gear that needs lubrication, as well as the differential.

They actually will need oil changes starting anywhere from the 50k to 100k mile mark.

Here's the maintenance guide with pictures walking through changing the oil and filter for the Rear Drive Unit (RDU) in a Tesla Model S:

https://service.tesla.com/docs/ModelS/ServiceManual/Palladiu...