Oil companies BP and Shell dropped their petrol prices by 4 cents per litre today.
All grades of petrol dropped by 4 cents per litre, with unleaded 91 dropping to 177.9 cents per litre, BP said.
There was no change to the price of diesel.
Shell also dropped prices by 4 cents on both grades of petrol.
A decrease in the international price of petrol was behind the drop, BP acting managing director Jonathan Wake said.
Mobil and Caltex could not be reached for comment.
