According to data collated daily by National Roads and Maintenance Association (NRMA), there's a 30-cent-plus discrepancy as to what you pay for fuel, depending on where you fill up across the state.

Average fuel prices range from 108.2 cents per litre in Gouburn to a whopping 141.2 cents per litre in Mudgee.

To put that into context, on Friday, February 27, motorists filling up in Cowra were paying an average of around about 123 cents per litre.

Orange was listed in the top 10 cheapest places to buy fuel in western NSW by the NRMA, however at the time of print, drivers were filling up there at an average of 128.7 cents a litre.

Motorists in Cootamundra and Parkes are still paying over 130 cents a litre for fuel while Bathurst drivers are only being charged an average of 121 cents per litre.

Western NSW NRMA director Fiona Simson said motorists could potentially save hundreds of dollars every year by searching for the cheapest fuel.

"The message that people are giving us is they find it amazing towns so close have a big differential in fuel price," she said.

"These figures are showing us the pressure of an independent retailer has a huge impact."

Ms Simson said the presence of independent fuel retailers could create strong competition that benefited motorists.

"Regardless of who is selling the cheapest petrol in any town, we want motorists to support them as that is a good way to create competition and ultimately, cheaper prices," she said.

Ms Simson said grassroots monitoring of petrol prices via social media has had a hand in driving prices down across the board.

Her message? Keep it up.

"It is very important the price of fuel is competitive," Ms Simson said.

"The NRMA encourages local motorists to share pricing information on social media and support the cheaper retailer."