Petrol prices notoriously rise over public holidays and long weekends however this year will come with a much higher price tag.
"We know that petrol prices are skyrocketing," Minister for Customer Services Victor Dominello said.
According to NSW Government data, petrol prices can differ by up to 30 cents a litre in the same suburb and stretch of road.
On average this year, around the M7 Costco at Casula has the average price for E10 at $1.67 but down the road at Crossroads BP it's $2.33.
On the M5, Metro at Narwee has an average price of $1.74 but at BP in Milperra it's $1.87.
The Speedway at North Ryde on the M2 has the cheapest E10 at $1.75 but the 7-11 at Northmead is $1.91.
The Speedway at Haberfield on the M4 averages at $1.79 and down the road the Coles Express at Stanmore is $1.90.
Other key roads like the Pacific Highway see similar discrepancies between retailers, with an 11 cent per litre difference between Wahroonga and Waitara.
"Independent retailers consistently have cheaper prices and that's why we are encouraging consumers to jump on that fuel check app and make sure they are getting that up to 25 cent saving," Minister for Fair Trading Eleni Petinos said.
The major price differences have sparked a renewed call from the state government for drivers to download the state's fuel check app.
It has already hit two million downloads as drivers hunt down the cheapest prices.
"You see all the petrol stations in NSW on your phone in real time so you see all the prices so you can make an informed decision," Dominello said.
"It can save you up to $800 a year."