MOTORISTS in Grafton and Tweed Heads are paying 7.5 cents a litre less for petrol than those in Ballina or Port Macquarie - an "incomprehensible" figure, according to NRMA deputy president Wendy Machin.
The organisation analysed unleaded and diesel prices over 13 months to February this year, finding a North Coast motorist travelling 30,000km would save about $225 a year if they lived in one of the region's cheapest towns.
"It simply comes down to competition and a stronger presence of independent retailers who often have discounted prices," Ms Machin said.
"It's no surprise that Grafton, Tweed Heads South, Muswellbrook and Casino were all ranked within the top 10 cheapest average prices in the state - all have competitive independent retailers."
Ms Machin encouraged motorists to use the NRMA's online Bowser Buster petrol price tool to plan their petrol stops when travelling around the North Coast.
She also said sharing pricing information on social media each day could help drive down prices.
"It can have an impact on competition as other competitors may be forced to lower their price if one station is getting all the business because they're cheaper," she said.
-Check the weekly average NSW fuel prices by town on the NRMA's Bowser Buster at mynrma.com.au.
TUESDAY'S AVERAGE UNLEADED PRICES
Grafton - 119.2
Tweed Heads South - 119.9
Casino - 120
Kempsey - 122.5
Lismore - 122.8
Coffs Harbour - 125
Port Macquarie - 127.3
Ballina - 133.4