MAJOR regional towns have been hit with a petrol price spike up to 13c per litre, which the RAA is calling a "blatant rip-off".
RAA Senior Analyst Chris West said prices in Kadina, Mount Gambier, Murray Bridge, Naracoorte, Port Augusta, Port Lincoln, Whyalla, Port Pirie, Renmark and Victor Harbor are all reporting significant price hikes.
"Many of these towns had maximum prices in the low to mid $1.40c per litre range, but these prices all moved up to 13c per litre at the same time over the last 24 hours," he said.
"This is a blatant rip off. The industry can legitimately increase prices by 3c per litre due to recent wholesale price increases but certainly not up to 13c per litre."
Analysis of fuel data reveals that the largest price spikes have occurred in towns with large supermarket fuel outlets.
"Motorists in these affected towns are being held to ransom," Mr West said.
"The only way they can access a fair price is by using the full double discount offered by the supermarkets."
Mr West said the Australian Competition and Consumer Commission must investigate the situation to "determine whether the supermarkets are trying to recoup their lost profits in metropolitan areas from country motorists."
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