Refining New Zealand has completed its first week of construction on new energy efficient petrol-making machinery.
The $365 million project will be completed in 2015. It will reduce the amount of oil consumed in the manufacture of products, as well as reducing emissions.
Meanwhile, the refining company says its gross refining margins for the March and April rose to $US5.04, up from $US4.18, in the previous two months, even though diesel making machinery was out of use for five days because of a leak.