KEY POINTS:
The price of petrol has risen again with oil companies raising it by 3c a litre.
Unleaded 91 octane is now selling at 155.9c a litre and 96 octane at 160.9c.
Shell spokeswoman Jackie Maitland said today that the company put its price up this afternoon by 3 cents a litre.
"The price increase only affects petrol -- regular and super but not diesel. But I understand our competitors have moved on diesel as well."
Ms Maitland said that the increase was due to the increased cost of products.
"We have a commitment to review our prices daily," she said.
Caltex spokeswoman Sharon Buckland confirmed the company had increased its petrol prices by 3c a litre.
"However, our price on diesel is unaffected and remains the same."
She attributed the rise to international price increases for refined fuel.
BP spokeswoman Diana Stretch confirmed it had also increased its petrol prices by 3 cents a litre.
The price of diesel remained unaffected.
Ms Stretch said the price rise was due to the increase in cost of petrol in the international market.
- NZPA