Thirteen Z Energy service stations are out of 95 octane petrol as a result of the ruptured Marsden Pt fuel pipeline, the company says.

LISTEN ABOVE TO Z ENERGY SPOKESMAN, JONATHAN HILL, TALK LARRY WILLIAMS.

This morning just four Z stations were out of the premium fuel, but this afternoon it said that number had more than tripled.

Z Energy has been prioritising trucking 91 octane and diesel from its plants elsewhere in the country as these are used by the majority of motorists.

"As a result of this deliberate focus, a few service stations have run out 95 octane petrol. However, all grades of fuel are being trucked into the city and sites will be replenished soon," the company said in a statement.

At this stage, only Z service stations have reported running out of fuel as a result of the incident, which has been causing havoc in the aviation industry with scores of flights in and out of Auckland Airport cancelled, delayed or diverted.

Auckland Caltex stations, which are operated as franchises owned by Z, do not appear to be affected by the shortage at this stage. The 12 stations contacted by the Herald said they were all adequately stocked with 95, however, the St Heliers station did not receive its 95 delivery today but this was due to arrive tomorrow. A staff member said it would likely run out of 95 otherwise.

BP spokeswoman Leigh Taylor said the company continued to have all grades of fuel available.

She said if there were to be any shortages they would be "intermittent and short-lived".

BP was bringing in fuel to Auckland from other parts of the country.

Mobil Oil New Zealand managing director Andrew McNaught said it did not have any supply issues or stock outages for ground fuel in the Auckland region.