A salvage team remained on board the Rena on Friday night, pumping some of the remaining 350 tonnes of oil from the ship.
Maritime New Zealand says the crew is still focusing on getting hydraulic and lube oils from the engine room into a central tank and from there onto the Awanuia, an oil-pumping barge.
Salvors on Friday abandoned attempts to drain a submerged passageway to reach the last remaining tank containing heavy fuel oil, after divers found a barrier to contain the water had been destroyed.
Sea water is now being pumped into the starboard tank, to extract oil, but at a slower rate using two hot taps which were installed Friday.
The Rena has been aground on Astrolabe reef since 5 October.
Svitzer Salvage says it is drawing up plans for the removal of containers from the vessel.