The New Zealand Refining Company says a fire inside the Marsden Point oil refinery on Saturday morning should not interrupt its ability to supply fuel.
The company has been assessing the damage from a blaze that broke out in an operating unit at about 1am.
The Fire Service initially described the blaze as major. Crews from nearby stations were called to bring it under control.
The company says the fire started when a leak of hydrocarbon gas ignited in a crude oil distilling unit.
It says the damage caused was minor and no one was injured.
