How do I maintain a newly laid oiled floor?
Any oil-based finish is not very durable and must be renewed periodically. Flooring is usually finished with a polyurethane varnish for this reason (in the old days it would have been an alkyd varnish). It does; however, preserve the look and feel of real wood without having an obvious film finish on top of it.  

The installation process can scuff up the surface which is why hardwood floors are finished after they are installed.

The MSDS for Woca oil (here) indicates the presence of a drying agent so it shouldn't be too much trouble to wipe on another coat - it should cure fairly fast.