The truck loading facility at the Marsden Pt refinery has begun rolling out fuel-laden tankers.
Ther facility was tested for product quality and safety on Thursday and a trial loading into a road tanker took place.
"All going well, other road tankers will be loaded thereafter," Refining New Zealand communications manager Greg McNeill said.
Emergency services were on hand at the refinery on Friday as the loading got underway in earnest.
Twelve army drivers have been deployed to drive the civilian tankers taking jet fuel to Auckland, Palmerston North and Napier around the clock from Thursday until Saturday, September 30.