When charging refrigerant only
WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
When charging refrigerant without replacing any component, replenish the same amount of measured oil when recovering refrigerant (if not measure, replenish 10 cm3 (10 ml, 0.34 US.oz, 0.35 Imp.oz) oil).