Photo by Bidgee from Wikimedia Commons

According to ACCC website, petrol price fluctuates by almost 10% within the week cycle. The best day to buy petrol in Sydney is Wednesday and Friday is the worst.

Average petrol retail prices for last 30 days in Sydney

Here are websites listing the places to find a lowest petrol prices in Australia:

• FuelWatch (Perth)
• MotorMouth (Australia Wide)